热学测试

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Q1:In a sealed glass container, an ideal gas isheated so that its pressure increases without breaking the glass or the seal.Which of the following is true?

A. The process is adiabatic.
B. The process is isothermal.
C. No work is done on the gas.
D. Positive work is done by the gas.
E. The process is isobaric

Q2:What happens to the efficiency of an ideal heatengine as the temperature in the hotter chamber decreases and the temperaturein the colder chamber increases?

A. Efficiency approaches 100%.
B. Efficiency approaches 0.
C. Efficiency is unchanged.
D. Efficiency levels off at 50%.
E. Efficiency depends upon rate of heat flow.

Q3:To doublethe rms speed of an ideal gas, the Kelvin temperature must:

A. be one-fourth the original value
B. be one-half the original value
C. stay the same
D. be doubled
E. be quadrupled

Q4:At one point in a thermodynamic cycle, one moleof an ideal gas is under 100 Pa of pressure and has a volume of 2 cubicmeters. What is the approximatetemperature of the gas?

A. 25 K
B. 50 K
C. 100 K
D. 200 K
E. 300 K

Q5:Two hundred Joules of heat are added to an idealgas during a process in which there is no change in pressure or volume. That heat is used by the gas to:

A. Do positive work.
B. Do negative work.
C. Increase its internal energy.
D. Expand.
E. Decrease its total potential energy.
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