Chapter 19: Q. 2 (page 543)
Do (a) temperature, (b) heat, and (c) thermal energy describe a property of a system, an interaction of the system with its environment, or both? Explain.
A. In the system, thermal energy is seen if the system behaves isolated in nature. No interaction has not seen in the environment.
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Shows two different processes taking an ideal gas from state i to state f.
Is the work done on the gas in process A greater than, less than, or equal to the work done in process B? Explain.
of nitrogen gas at and an initial pressure of undergo an isobaric expansion until the volume has tripled.
a. What are the gas volume and temperature after the expansion?
b. How much heat energy is transferred to the gas to cause this expansion?
The gas pressure is then decreased at constant volume until the original temperature is reached.
c. What is the gas pressure after the decrease?
d. What amount of heat energy is transferred from the gas as its pressure decreases?
e. Show the total process on a diagram. Provide an appropriate scale on both axes.
moles of an ideal gas at temperature and volume localid="1648032029846" expand isothermally until the volume has doubled. In terms of and , what are (a) the final temperature, (b) the work done on the gas, and (c) the heat energy transferred to the gas?
A gas cylinder holds 0.10 mol of O2 at 150C and a pressure
of 3.0 atm. The gas expands adiabatically until the volume is doubled.
What are the final (a) pressure and (b) temperature?
The specific heat of most solids is nearly constant over a wide temperature range. Not so for diamond. Between 200 K and 600 K,
the specific heat of diamond is reasonably well described by c = 2.8T - 350 J/kg K, where T is in K. For gemstone diamonds, 1 carat = 200 mg. How much heat energy is needed to raise the temperature of a 3.5 carat diamond from -50°C to 250°C?
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