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- Many compressed gases come in large,heavy metal cylindersthat are so heavy that they need a special cart to move them around. An80.0-Ltank ofnitrogen gas pressurized to 172 atm is left in the sun and heats from its normal temperature of 20.0C to 140.0C. Determine a the final pressureinsidethe tank and b the work, heat, and U of the process. Assume that behavior is ideal and the heatcapacity of diatomic nitrogenis 21.0J/mol.K.Q1) A constant volume tank contain 1 mole ofC7H14and 12 mole of O2 gas at a temperature of 25 °C and 1 bar. The contents of the tank is ignited and C7H14 is burned completely and final products temperature is found to be 1700 K. Determine the heat transfer during this process. ( take daltaHo = -47800 kJ/kg).A cube of sugar (i.e., sucrose, MM = 342.30 g mol-¹) is burned under an atmosphere of oxygen and releases 9.75 kJ of heat. The density of the cube is 1.59 g cm-³. Determine the average length of one of the sides of the cube in cm. The standard enthalpy of combustion, AHO of sucrose is comb.' -2226 kJ mol-¹. Give your answer in cm and to two decimal places.
- vo/index.html?deploymentld%355750828934189288909969212&elSBN=9781305657571&nbld%3D2199898&snapshotld... NDTAP Q Searc Quick Prep Use the References to access important values if needed for this question. A gas is compressed and during this process the surroundings do 97.3 J of work on the gas. At the same time, the gas loses 224 J of energy to the surroundings as heat. What is the change in the internal energy of the gas? Submit Answer 5 question attempts remainingus engine.html?ClassID=1087757335 Calculate the standard enthalpy of formation for ethane, C2H6, using the enthalpy for the reaction and the formation data. 2C2H6(g) + 702(g) → 4CO2(g) + 6H2O(g) AHxn = -2858 kJ Compound AH°; (kJ/mol) C,Ho(g) Co,(g) H,O(g) AH; = [ ? ] kJ -394 -242 Enter either a + or - sign and the magnitude. EnterThermo- Problem 4.23 At 298 K. AH; 131.28 kJ-mol for the reaction -1 with Cp.-8.53, 33.58, 29.12, and 28.82 J K mol for graphite, H₂O(g). CO(g), and H₂(g), respectively Part A Calculate AH; at 210 *C from this information. Assume that the heat capacities are independent of temperature. Express your answer to five significant figures and include the appropriate units. ΔΗ: (210 °C) - Submit Provide Feedback HÅ Value Request Answer Units C(graphite) + H₂O(g) → CO(g) + H₂(g)
- A gas in the initial state of p1 = 75 psia and V1 = 5 ft.3 undergoes a process to p2 = 25 psia and V2 = 9.68 ft., during which the enthalpy decreases 62 BTU. The %3D specific heat at constant volume is c, = 0.754 BTU/lb.°R. Determine (a) the change of internal energy, (b) the specific heat at constant pressure, (c) the gas constant R.°Construct enthalpy cycles; use Hess's law and the following data to calculate the enthalpy of formation of ethane (from carbon and hydrogen gas). Cis) + Ozig) + CO2(g) AHa = -394kJmol H2g) + %02(a) – H20 m AH°. = -286kJmol1 + 3%O2(g) → 2002(9) + 3H20 m AH = -1560kJmol1Five moles of monatomic ideal gas enter the abc cycle and during a complete cycle 600 J of heat is removed from the gas. Process ab is under constant pressure and process bc is increasing at constant volume takes place at pressure. The temperatures of points a and b are Ta-= 3°C and Tb= 63°C. Draw the pV diagram of this cycle.
- H.W: The heat capacity of ammonia, defined as the amount of heat required to raise the temperature of a unit mass of ammonia by precisely 1° at a constant pressure, is, over a limited temperature range, given by the expression Btu C, 0.487+2.29 x 10-4T(°F) %3D Ibm°F Determine the expression for C, in J/(g °C) in terms of T( C).The heat index (HI) is an estimate of the temperature felt by the human body based on the actual measured air temperature T (in °F) and relative humidity h,. It is given by HI = - 42.379 + 2.049015237 + 10.14333127h, – 0.22475541Th, – (6.83783 x 10-3)T² - (5.481717 x 10-2)h,² + (1.22874 x 10-3)T*h, + (8.5282 - 10-4)Th,? - (1.99 x 10-6)T°h,?. a. If the air temperature in your area is 107ºF with a relative humidity of 8%, how hot does your body feel? b. If the air temperature and relative humidity is known to be increasing at a rate of 2°F per sec and 1% per sec, resp., how fast is the heat index changing at the moment when the air temperature in your area is 107°F with a relative humidity of 8%?1 kg of benzene is poured into a flask and heated to 353 K (the boiling point of benzeneat 1 atm.) using a heating element that has a power of 700 W (we ignore thatit's probably not so healthy and smart to do). After 5 minutes, when the benzene has stoodboiling point, the heating element is taken up, and the remaining mass of benzene in the flaskmeasured at 470 grams. Determine the enthalpy of vaporization of benzene.