Which is the best definition of air pressure? A. the amount of water vapor in the air.

B. the weight of the air pressing on everything in the environment

C. the amount of precipitation in a certain area

D. the type of clouds in the atmosphere

For the following, determine the type of reaction and then give products.

The fact that the total amount of energy in a system remains constant is a(n)

A5 mole sample of liquid acetone is converted to a gas at 75.0°c. if 628 j are required to raise the temperature of the liquid to the boiling point, 15.600 kj are required to evaporate the liquid, and 712 j are required to raise the final temperature to 75.0°c, what is the total energy required for the conversion?