P199 Midterm Chapters 5-

Heat energy is measured in units of

both joules and calories

When work is done by a system and heat is subtracted, the temperature of the system

decreases

When the temperature of a fixed volume of air initially at 0 degrees C is lowered by 1 degree, its pressure

decreases by 1/273

Which law of thermodynamics is a restatement of the conservation of energy as it applies to thermal systems?

first law

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

higher temperature, but less thermal energy

Whether one object is warmer than another object has most to do with molecular

kinetic energy

Which law of thermodynamics states that no system can reach absolute zero?

third law

The lowest possible temperature is

-273 degrees C

Absolute zero corresponds to a temperature of

0 K

Room temperature on the Kelvin scale is about

300 K

Increasing the temperature of 50 grams of water by 1 degrees C requires

50 calories

The temperature of water rises when 2.00 calories are added. It will rise the same when

8.38 J are added

What is the difference between a calorie, a Calorie, and a joule?

A calorie is the energy needed to warm 1 g of water by 1 degree C; a Calorie is 1000 calories; a calorie is 4.19 joules

On which temperature scale is 0 degrees the freezing point of water?

Celsius

On which temperature scale is 212 degrees the boiling point of water?

Fahrenheit

Which is greater: an increase in temperature of 1 degree C or an increase of 1 degree F?

an increase of 1 degree C is larger

The final temperature of 1 liter of 40 degrees C water poured into 1 liter of 20 degrees C water is

at or about 30 degrees C

At absolute zero, a substance has

no more energy to give up

Which law of thermodynamics addresses the direction of heat flow?

second law

When the temperature of a quantity of 0 degree C air at constant pressure is lowered by 1 degree, its volume

shrinks by 1/273