Q: How much energy is needed to melt 2.00 kg if ice at 0 degrees Celsius
A: Given: Mass, m=2.00 kg To determine energy needed to melt 2.00 kg if ice at 0 degrees Celsius.
Q: How much heat in kcal must be added to 0.30 kg of water at room temperature (20 degrees Celsius) to…
A: The mass of water is, The change in the temperature of water is,
Q: After the 1kg block of ice melts, the amount of heat required to raise its temperature to 10 oC is
A: The heat required to raise temperature to 10 degree Celsius is the sum of heat gained for meting ice…
Q: How much heat is necessary to change 300g of water at 10 degrees celsius into water at 90 degrees…
A: It is given that,
Q: 20 g of 60°C water is mixed with 100 g of 15 °C water. What is the final temperature after heat…
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Q: How many calories are needed to change 10 grams of ice at 0 degree to steam at 100 degree Celsius?
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Q: A quantity of steam (390 g) at 113 degrees Celsius is condensed, and the resulting water is frozen…
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Q: 450 grams of Peach Punch at 5 degrees C is poured into an 800g glass bowl at 20 degrees C. What is…
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Q: How much heat must a gram of water at 15 celcius lose to turn into ice at -10 celcius? A) 105 Cal B)…
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Q: How much heat is necessary to change 435 g of ice -8 degrees Celsius to water at 20 degrees Celsius?
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Q: How many kilocalories of heat would be needed to melt 20kg of ice at -30 degrees Celsius and…
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Q: a small metal bar, whose initial temperature was10 degrees celcius, is dropped into a large…
A: According to Newton's Law of Cooling, T = Tm + cekt, where T = the required temperature after time…
Q: How much heat transfer is required to raise the temperature of a 0.75kg aluminum pot containing…
A: Given data: Mass of the aluminium pot is, mAl = 0.75 kg Mass of water contain in, aluminium pot is,…
Q: How much heat in joules is needed to raise the temperature of 5.0 L of water from 0 degrees Celsius…
A: Given data: Volume of water = 5.0 L = 5.0 × 10-3 m3 Initial temperature (T0) = 0 °C Final…
Q: how many caloriers are absorbed by a pot of water with a mass of 500g in order to raise the…
A: Given data: Mass (m) = 500 g Initial temperature (Ti) = 20°C Final temperature (Tf) = 30°C…
Q: 4 kg of ice at 0◦C is converted to steam at 100◦C. How much heat is needed? The heat of fusion…
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Q: How much heat is required to melt a 3-kg iron? A.272,000 J B.300,000 J C.816,300 J
A: Given: Mass of iron, m = 3 kg. To Find: The amount of heat required for melting.
Q: A mixture of 0.1 kg ammonia and 0.1 kg water is to be cooled from 20 Celsius to 5 Celsius. How much…
A: Given data The mass of the ammonia is ma = 0.1 kg=100 g The mass of the water is mw = 0.1 kg= 100 g…
Q: What would be the final temperature if you mixed 50 g of 20 deg C water and 50 g of 40 deg C water?
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Q: Convert the following Kelvin temperatures to Celsius temperatures: a)225 K b)420 K c) 973 K
A: The temperature unit is converted as 0 °C=273 K
Q: How much heat in kcal must be added to 0.39 kg of water at room temperature (20 degrees Celsius) to…
A: Given data The mass of the water is given as m = 0.39 kg. The initial temperature of the water is…
Q: an 60 gram silver spoon at 21 degrees C is place in a cup of coffee at 95 degrees C. the specific…
A: Answer 218.4 cal
Q: The number of grams of ice that can be melted by 1.5 g of 100oC steam is ______.
A: Given data The mass of steam is given as ms = 1.5 g. The temperature of the steam is given as Ts =…
Q: An 55 gram silver spoon at 23 degrees C is place in a cup of coffee at 95 degrees C. The specific…
A: Data provided : Mass of spoon (m) = 55 gram Initial temperature (Ti) = 23 °C Specific heat of silver…
Q: What is the unit of calorific value? A) kN/kg B) kJ/kg C) kW/sec D) kCal/sec
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Q: If 100 calories are added to 40 g water, calculate the change in the water temperature(T) water…
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Q: If 83g of ice at 0.0deg C is added to 242g of water at 68deg C, what will the temperature of the…
A: Data Given , Mass of ice ( mi ) = 83 g temperature of ice ( ti ) = 0° C Mass of water ( mw ) = 242…
Q: If 10 grams of 20 degree water is mixed with 10 grams of 40 degree water, what would the final…
A: If (m1)10 grams water of (T1) 20 degree centigrade teperature mixed with (m2) 10 grams water of (T2)…
Q: What would be the final temperature of a mixture of 100 g of water at 20 C temperature and 150 g of…
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Q: What is the heat in calories required to raise the temperature of 0.05 kg of water from 0 degrees C…
A: Given data: Mass (m) = 0.05 kg Initial temperature (Ti) = 0°C Final temperature (Tf) = 100°C…
Q: How much heat is needed to freeze 2 kg of water at 70 degree C to convert it to ice cubes at -11…
A: When heat energy is supplied or absorbed from an object , the temperature of the object will…
Q: How much heat is necessary to change 100g of ice at -20°C into water at 10°C? a) 2 Kcal b) 0.2 Kcal…
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Q: 10 grams of ice at 0 degree celcius was mixed with 15 grams of water at temperature of 20 degreee…
A: mass of ice = mice= 10 grams temperature = tice= 0 degree mass of water = mw=15 grams temperature of…
Q: of Solutions ► If 1.00 kJ of heat is absorbed by a 15.5 g ice cube at -5.00 °C, what will the final…
A: Given, heat absorbed, Q = 1 kJ = 1000 J mass of ice, m = 15.5 g initial temperature, Ti=-5 °C final…
Q: 50 g of ice at 10°C is mixed with 70 g of water at 90°C, what will be the final temperature of a…
A: Let Tf be the mixture’s final temperature.
Q: How much heat is required to change steam at 130 degrees Celsius to ice at -20 degrees Celsius?
A: The specific heat is the amount of heat per unit mass required to raise the temperature by one…
Q: How much natural gas does it take to heat a home? 26 litres of water between 0 and 30 degrees…
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Q: How many joules are needed to change the temperature of 1 gram of water by 1 degree C?
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Q: How much ice is needed to make ice tea at a temperature of 5 C from 140 grams of hot tea at 65 C…
A: Given:Mass of tea,M=140 gmMass of glass,mg=50 gmTemperature of tea,Ti=65°CTemperature of…
Q: How much water at 20 degrees Celsius is needed to melt 500 grams of ice at 0 degree Celsius? a.…
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Q: How much heat in Calories does it take to raise 2000 g of water by 4.5 Degrees C?
A: The amount of heat required to rise the temperature of water is, Q=mc∆T the specific heat of water…
Q: How much heat is required to raise the temperature of 4 gal of water from 60 degrees Fahrenheit to…
A: Given in question - Mass of water = 4 gal Initial…
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- At 25.0 m below the surface of the sea, where the temperature is 5.00C, a diver exhales an air bubble having a volume of 1.00 cm3. If the surface temperature of the sea is 20.0C, what is the volume of the bubble just before it breaks the surface?Compare the rate of heat conduction through a 13.0-cm-thick wall that has an area of 10.0 m2 and a thermal conductivity that of glass wool with the rate of heat conduction through a 0.750-cm-thick window that has an area of 2.00 m2, assuming the same temperature difference across each.One easy way to reduce heating (and cooling) costs is to add extra insulation in the attic of a house. Suppose a single-story cubical house already had 15 cm of fiberglass insulation in the attic and in all the exterior surfaces. If you added an extra 8.0 cm of fiberglass to the attic, by what percentage would the heating cost of the house drop? Take the house to have dimensions 10 m by 15 m by 3.0 m. Ignore air infiltration and heat loss through windows and doors, and assume that the interior is uniformly at one temperature and the exterior is uniformly at another.
- The thermal conductivities of human tissues vary greatly. Fat and skin have conductivities of about 0.20 W/m K and 0.020 W/m K, respectively, while other tissues inside the body have conductivities of about 0.50 W/m K. Assume that between the core region of the body and the skin sin face lies a skin layer of 1.0 mm, fat layer of 0.50 cm, and 3.2 cm of other tissues. (a) Find the R-factor for each of these layers, and the equivalent R-factor for all layers taken together, retaining two digits. (b) Find the rate of energy loss when the core temperature is 37C and the exterior temperature is 0C. Assume that both a protective layer of clothing and an insulating layer of unmoving air a absent, and a body area of 2.0 m2.One of a dilute diatomic gas occupying a volume of 10.00 L expands against a constant pressure of 2.000 atm when it is slowly heated. If the temperature of the gas rises by 10.00 K and 400.0 J of heat are added in the process, what is its final volume?4 kg of ice at 0◦C is converted to steam at100◦C.How much heat is needed? The heat offusion for water is 79500 cal/kg, its heat ofvaporization is 5.4 × 10^5cal/kg, and its specific heat is 1000 cal/kg ·◦ C.Answer in units of kcal.
- For the human body, what is the rate of heat transfer by conduction through the body’s tissue with the following conditions: the tissue thickness is 3.00 cm, the change in temperature is 2.00ºC , and the skin area is 1.50 m2 . Howdoes this compare with the average heat transfer rate to the body resulting from an energy intake of about 2400 kcal per day? (No exercise is included.)A mass of 50 g of a certain metal at 150° C is immersed in 100 g of water at 11° C. The final temperature is 20° C. Calculate the specific heat capacity of the metal. Assume that the specific heat capacity of water is 4.2 J gʻ¹K¯¹.On a hot dry day, evaporation from a lake has just enough heat transfer to balance the 1.00 kW/m2 of incoming heat from the Sun. How many kg of water evaporate in 1.25h from each squre meter of the lake, You assume the latent heat of vaporization for water here is Lv= 2414kJ/kg m?
- (a) The specific heat of copper is 92.5 Jkg-1°C¯1. A copper with mass of 250 g was heated to 100 °C. Ah Beng makes a conclusion that the copper now contains 2312500 J of heat. Point out the mistakes in this conclusion and correct them.At a foundry, 22 kg of molten aluminum witha temperature of 660.4◦C is poured into amold.If this is carried out in a room containing150 kg of air at 25◦C, what is the temperatureof the air after the aluminum is completelysolidified? Assume that the specific heat capacity of air is 1.0×10^3J/kg ·◦C. The specificheat of aluminum is 899 J/kg ·◦ C and its latent heat of fusion is 3.97 × 10^5J/kg.Answer in units of ◦C(a) Calculate the rate of heat conduction through house walls that are 13.0 cm thick and that have an average thermal conductivity twice that of glass wool. Assume there are no windows or doors. The surface area of the walls is 120 m2 and their inside surface is at 18.0ºC , while their outside surface is at 5.00ºC . (b) How many 1-kW room heaters would be needed to balance the heat transfer due to conduction?