In a piston-cylinder assembly air is compressed slowly and isothermally from an initial volume of 450 cm3 to a final volume of 200 cm3. The air is initially at 120 kPa. Evaluate the amount of heat transferred.

Give one example to show that when substances are mixed, it may result in a chemical or a physical change depending on the conditions.

One number is said to be an "order of magnitude" larger than another number if choose one: a. it is 10 times larger. b. it is 5 times larger. c. it is 3 times larger. d. it is 100 times larger. e. it is 2 times larger.

It takes a lot of energy to get the temperature of water to increase and eventually boil because water has a high heat.