Physics Chapter 24 – Flashcards

A volume of air has a temperature of 0 degrees Celsius. An equal volume of air that is twice as hot has a temperature of about...

Adiabatic processes occur in...

The greater the difference in temp between the input reservoir and output reservoir for a heat engine, the..

When mechanical work is done on a system, there can be an increase in its... temperature internal energy both of the above none of the above

If a volume of air is swept upward with no heat input or output, its temperature will do what?

When work is done by a system and no heat is added to it, the temperature of the system...

When a volume of air is compressed and no heat enters or leaves, the air temperature will...

Suppose the temperature of the input reservoir in a heat engine does not change. As the sink temperature is lowered, the efficiency of the engine...

Two identical blocks of iron, one at 10 degrees C and the other at 20 degrees C, are put in contact. Suppose the cooler block cools to 5 degrees and the warmer block warms to 25 degrees C. this would violate the...

As a system becomes more disordered, entropy does what?

Systems that are left alone tend to move toward a state of...

What does entropy measure?

Entropy is closely related to what law of thermodynamics?

Running a refrigerator with its door open in a hot room makes the room...

In buildings that are electrically heated, turning the lights on... doesn't waste energy wastes energy does neither of the above

Pull a closed plastic bag of dry air quickly down from a high elevation and the bag of air will become...

Cool a sample of air from zero on the Celsius scale to near zero on the absolute scale and the air loses... Volume Pressure Both of the above Neither

True or False: It is possible to wholly convert a given amount of heat energy into mechanical energy.

True or False: It is possible to wholly convert a given amount of mechanical energy into heat.

True or False: Air high in the atmosphere that plunges downward tends to cool.

True or False: Systems left alone tend to move to a state of greater entropy.

True or False: When work is done by a system on something else, the temperature of the system decreases.

True or False: If the internal energy of a volume of air at 10 degrees C is doubled, its temperature will then be 20 degrees C.

True or False: Efficiency in a heat engine is increased where there is a greater difference in input and output temperatures.

True or False: If all the friction could be eliminated in a heat engine, its efficiency would be 100%.

True or False: Whenever heat is added to a system, it transforms to a equal amount of some other form of energy.