Physics for Scientists and Engineers
10th Edition
ISBN: 9781337553278
Author: Raymond A. Serway, John W. Jewett
Publisher: Cengage Learning
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Chapter 20.3, Problem 20.3QQ
To determine
The types of energy that are contributing to the molar specific heat.
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The enthalpy of a system is given by the equation H=U+PV where U is the internal energy, P=pressure, and V=volume. In addition, the internal energy, U=Q+W where Q is the heat and W is the work. Suppose we want to find the rate of change in the enthalpy at constant pressure of 1.75 atm, what is the value when heat is absorbed by the system at a rate of 55 J/s and work is done by the system at a rate of 200 J/s when the change of volume is rated at 76 x 10^-5 m^3/s?
1. What is the change in heat with respect to time?2. What is the change in internal energy of the system with respect to time?3. What is the change in enthalpy of the system with respect to time?
Problem 2:
The enthalpy of a system is given by the equation H = U + PV where U is the internal energy, P = pressure, and V = volume.
In addition, the internal energy, U = Q + W where Q is the heat and W is the work. Suppose we want to find the rate of
change in the enthalpy at constant pressure of 1.25 atm, what is the value when heat is absorbed by the system at a rate
of 45 J/s and work is done by the system at a rate of 100 J/s when the change of volume is rated at 35 x 105 m/s?
1. What is the change in heat with respect to time?
2. What is the change in internal energy of the system with respect to time?
3. What is the change in enthalpy of the system with respect to time?
Q1) The molar specific heat of a diatomic gas is measured at constant volume and found to be 29.1 J/mol. K. The types of energy that arecontributing to the molar specific heat are: (a) translation only (b) translation and rotation only (c) translation and vibration only (d) translation, rotation, and vibration. And why?
Chapter 20 Solutions
Physics for Scientists and Engineers
Ch. 20.1 - Two containers hold an ideal gas at the same...Ch. 20.2 - (i) How does the internal energy of an ideal gas...Ch. 20.3 - Prob. 20.3QQCh. 20.3 - Prob. 20.4QQCh. 20 - A spherical balloon of volume 4.00 103 cm3...Ch. 20 - A spherical balloon of volume V contains helium at...Ch. 20 - A 2.00-mol sample of oxygen gas is confined to a...Ch. 20 - Oxygen, modeled as an ideal gas, is in a container...Ch. 20 - A 5.00-L vessel contains nitrogen gas at 27.0C and...Ch. 20 - Prob. 6P
Ch. 20 - In a period of 1.00 s, 5.00 1023 nitrogen...Ch. 20 - A 7.00-L vessel contains 3.50 moles of gas at a...Ch. 20 - Calculate the change in internal energy of 3.00...Ch. 20 - Prob. 10PCh. 20 - In a constant-volume process, 209 J of energy is...Ch. 20 - A vertical cylinder with a heavy piston contains...Ch. 20 - A 1.00-L insulated bottle is full of tea at 90.0C....Ch. 20 - A certain molecule has f degrees of freedom. Show...Ch. 20 - You are working for an automobile tire company....Ch. 20 - Why is the following situation impossible? A team...Ch. 20 - You and your younger brother are designing an air...Ch. 20 - During the compression stroke of a certain...Ch. 20 - Air in a thundercloud expands as it rises. If its...Ch. 20 - Why is the following situation impossible? A new...Ch. 20 - Air (a diatomic ideal gas) at 27.0C and...Ch. 20 - Prob. 22PCh. 20 - Prob. 23PCh. 20 - Prob. 24PCh. 20 - Prob. 25PCh. 20 - The law of atmospheres states that the number...Ch. 20 - Prob. 27APCh. 20 - Prob. 28APCh. 20 - The dimensions of a classroom are 4.20 m 3.00 m ...Ch. 20 - Prob. 30APCh. 20 - The Earths atmosphere consists primarily of oxygen...Ch. 20 - Review. As a sound wave passes through a gas, the...Ch. 20 - Prob. 33APCh. 20 - In a cylinder, a sample of an ideal gas with...Ch. 20 - As a 1.00-mol sample of a monatomic ideal gas...Ch. 20 - A sample consists of an amount n in moles of a...Ch. 20 - The latent heat of vaporization for water at room...Ch. 20 - A vessel contains 1.00 104 oxygen molecules at...Ch. 20 - Prob. 39APCh. 20 - Prob. 40APCh. 20 - Prob. 41APCh. 20 - On the PV diagram for an ideal gas, one isothermal...Ch. 20 - Prob. 43APCh. 20 - Prob. 44APCh. 20 - Prob. 45CP
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- The internal energy of an ideal gas depends on A) its pressure. B) its temperature. C) its temperature, pressure, and volume. D) its temperature and pressure. E) its volume.arrow_forwardProblem 2: The specific internal energy and specific volume of liquid water at a temperature of 20.0°C and a pressure of 20.0 MPa are 82.77 kJ/kg and 0.0009928 m³/kg, respectively. Determine the specific enthalpy of the water under these conditions Water u=82.77 kJ/kg v=0.0009928 m³/kg T=20.0°C p=20.0 MPa h=?arrow_forward1 mole of a monoatomic gas is mixed with 3 moles of a diatomic gas. What is the molecular specific heat of the mixture at constant volume(R=8.31J/mol K)arrow_forward
- 2.40 moles of nitrogen gas at 252 K are kept in a container. (a) If the temperature of the gas is increased to 500 K at constant volume, how much heat was transferred to the gas? The molar specific heat capacity of nitrogen at constant volume is 20.8 J/mol. _________J (b) What is the change in internal energy of the gas due to this change in temperature at constant volume? _________J (c) Suppose the temperature of the gas is increased from 252 K to 500 K at constant pressure, how much heat is transferred to the gas? The molar specific heat capacity of nitrogen at constant pressure is 29.1 J/mol. _________J (d) How much work is done on the gas as its temperature increases at constant pressure? _________Jarrow_forwardThe constant-pressure heat capacity of a sample of a perfect gas was found to vary with temperature according to the expression Cp (J K-1) = 20.17 + 0.3665 (T/K). Calculate q when the temperature is raised from 25°C to 200°C at constant volume. 14900 J 14100J O -14100 J O -14100Jarrow_forwardA bottle of volume V = 0.15 m³ contains helium gas (a monatomic gas) at a pressure p = 722,266 Pa (Pascal = N/m² and temperature T = 300 K. Calculate a numerical value for the internal energy U of this gas. Include units in your answer, using Sl units (m for meters, kg for kilograms, s for seconds, J for joules, K for kelvin, etc.). Write your answer as an exponential as described in the instructions.arrow_forward
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