Exam 5: Temperature and Heat

A 4 kilogram block of ice is removed from a freezer where its temperature was maintained at -20 degrees Celsius. How much heat does the ice absorb as it is warmed to -10 degrees?  (The specific heat capacity of ice is 2,000 joules per kilogram degree Celsius.)

Internal energy can only be changed by adding heat

An object transfers heat when its temperature is lowered by contact with

Which are bigger-Celsius degrees or Fahrenheit degrees?

The lunar surface cools after the Sun sets. This is an example of

The average kinetic energy of the atoms in a spoon determines its __________.

On the Kelvin scale the temperature is proportional to the average kinetic energy of the atoms or molecules whose temperature is being measured.

Natural processes tend to increase the __________ of thermodynamic systems.

The coefficient of linear expansion of ordinary glass is three times that of Pyrex glass. An ordinary glass rod and a Pyrex glass rod of equal lengths at room temperature are dropped into boiling water. The change in length of the ordinary glass rod will be ___________ the change in length of the Pyrex glass rod.

Water is good for putting out fires because it has a very high latent heat of vaporization.

A device that makes use of a bimetallic strip is

As the air cools at night the relative humidity usually drops.

The specific heat capacity of water is about twice the specific heat capacity of ice. The amount of heat required to raise the temperature of 1 kg of water 10°C is __________ times the amount of heat required to raise the temperature of 1 kg of ice 10°C.

Stepping barefoot off a rug onto a hardwood floor makes your feet feel cold. Why?

The efficiency of a heat engine

The lowest temperature is called ______________.

Natural processes tend to increase the __________ of thermodynamic systems.

One "food calorie" equals 1000 calories.

A bimetallic strip is usable as a thermometer because of the property of __________.