1. How much heat is required to vaporize 26.0 g of water at 100°C?

2.How much heat is required to vaporize 76.7 g of acetone at its boiling point?

3.How much heat does your body lose when 2.9 g of sweat evaporates from your skin at 25°C? (Assume that the sweat is only water.)

4.How much heat does your body lose when 2.57 g of sweat evaporates from your skin at 25°C? (Assume that the sweat is only water.)

5.How much heat is emitted when 59.0 g of isopropyl alcohol condenses at 25°C?

6.The human body obtains 668 kJ of energy from a chocolate chip cookie. If this energy were used to vaporize water at 100°C, how many grams of water could be vaporized?

7.The human body obtains 1091 kJ from a candy bar. If this energy were used to vaporize water at 100°C, how much water in liters could be vaporized? (Assume that the density of water is 1.0 g/mL.)

8.How much heat is required to melt 43.6 g of solid diethyl ether (at its melting point)?

9.How much energy is released when 2.5 kg of diethyl ether freezes?