Physics

One hundred joules of heat is added to a system that performs 60 joules of work. The internal energy change of the system is

40 J

An ice skater skates on a thin film of water between the blades and the ice

True

If 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 273 degrees C.

True

If air pressure above water is removed, the water will boil and the resulting cooling can turn the water to ice

True

It is possible to totally convert a given amount of mechanical energy into heat

True

The process of boiling actually cools the water

True

When steam changes to water at 100 degrees Celsius, energy is released

True

The molecules in a room-temperature glass of water jostle around at

a great variety of speeds

Evaporation is a cooling process and condensation is

a warming process

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

greater the efficiency

An adiabatic process is characterized by the absence of

heat exchange

Increased air pressure on the surface of hot water tends to

prevent boiling

As a system becomes more disordered, entropy decreases

False

It is possible to wholly convert a given amount of heat energy into mechanical energy

False

The lowest temperature possible in nature is 4 K

False

When ice changes to water at 0 degrees Celsius, energy is released

False

The first law of thermodynamics is a restatement of the

conservation of energy

When a volume of air expands against the environment and no heat enters or leaves, the air temperature will

decrease

When water freezes, it

gives off energy

When a volume of air compresses and no heat enters or leaves, the air temperature will

increase

Suppose you put a closed, sealed can of air on a hot stove burner. The contained air will undergo an increase in

internal energy, temperature, and pressure

At high altitudes, the boiling point of water

is lower

Freezing occurs when matter changes from a

liquid to solid

Clouds form when warm air

rises, expands, and chills

Evaporation is a cooling process because

the more energetic molecules escape the liquid

Chinook winds tend to

warm an environment