unit 5

Question 1

When heat is absorbed by the system and work is done by the system on the surroundings then

Answer 1

q is positive and w is negative.

Question 2

For the reaction: 2A + B2 → 2AB ΔH = +50.0 kJ.

Answer 2

The reaction is endothermic.

Question 3

What law states that energy can be converted from one form to another, but cannot be created or destroyed?

Answer 3

first law of thermodynamics

Question 4

“The pressure of an ideal gas is inversely proportional to its volume at constant temperature and number of moles” is a statement of ________ law.

Answer 4

Boyle’s

Question 5

Which is not a property of a gas?

Answer 5

The densities of gases are much larger than those of corresponding liquids.

Question 6

Nitrogen will behave most like an ideal gas

Answer 6

at high temperature and low pressure.

Question 7

If two solutions are mixed together in a container and the container “feels hot”, then

Answer 7

the reaction is exothermic.