Chapter 8 & 9

Hot water will cool to room temperature faster in a

Black pot

Cold water will warm to room temperature faster in a

black pot

Consider a sample of water at 0C. If the temperature is slightly increased, the volume of water

contracts

Aluminum has a specific heat capacity more than twice that of copper. Place equal masses of aluminum and copper wire in a flame and the one to undergo the fastest increase in temperature will be

copper.

Energy transfer by convection is primarily restricted to

fluids

The moderate temperatures of islands throughout the world has much to do with water's

high specific heat capacity

Compared to a giant iceberg, a hot cup of coffee has

higher temperature, but less thermal energy.

An object will normally be a net radiator of energy when its temperature is

higher than its surroundings

Heat energy travels from an object with a high

temperature to an object with a lower temperature.

The reason that the white-hot sparks that strike your skin from a 4th-of-July-type sparkler don't harm you is because

the energy per molecule is high, but the total energy transferred is small.

Evaporation is a cooling process because

the more energetic molecules are able to escape the liquid.

We are warmed by condensation because water molecules in the air that strike our bodies

transfer some of their kinetic energies to us

When ice floats in water, a small part of it extends above the surface. Interestingly enough, the volume of ice that extends above the surface is equal to the volume of the

vast number of open spaces in the hexagonal ice crystals

Which of the following expands most when the temperature is lowered? Equal volumes of

water at 4C.

To say that evaporation is a cooling process is to say that the

water left behind cools

Ice tends to form at the

surface of bodies of water.

If a volume of air is warmed, it expands. If a volume of air expands, it

Cools

As a piece of metal with a hole in it cools, the diameter of the hole

Decreases

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

False

Suppose you rapidly stir some raw eggs with an eggbeater. The temperature of the eggs will

Increase

When a volume of air is compressed, its temperature

Increases

When a gas is changed to a liquid phase, the gas

Release energy

When liquids change to a solid phase, they

Release energy

A substance can absorb heat energy by the process of

all of these

Pour a liter of water at 40C into a liter of water at 20C and the final temperature of the two becomes

at or about 30C

A good reflector of radiation is a

poor absorber of radiation

The silver coating on the glass surfaces of a Thermos bottle reduces energy that is transferred by

radiation

Suppose you are served coffee at a restaurant before you are ready to drink it. In order for it to be the hottest when you are ready for it, you should add cream

right away.

It is commonly thought that a can of beverage will cool faster in the coldest part of a refrigerator. Knowledge of Newton's law of cooling

supports this common knowledge