Question 1
If the heat of fusion for water is 80. cal/g, how many calories are needed to melt 45.0 g of ice at 0 °C?
◦ 80. cal
◦ 0.56 cal
◦ 1.8 cal
◦ 3.6 cal
◦ 3.6 × 10
3 cal
Question 2
The formation of a gas resulting from the escape of high-energy particles from the surface of a liquid is known as ________.
◦ sublimation
◦ evaporation
◦ deposition
◦ melting
◦ boiling