1. Convert them
(a) 456 cal to joules
(b) 22.3 j to Calories
(c) 234 kj to Calories
(d) 12.4 Cal to joules
2. Calculate the amount of heat required to heat a 3.5-kg gold bar from 21 degrees celcius to 67 degrees celcius.
3. If 57 j of heat are added to an aluminum can with a mass of17.1 g, what is its temperature change?
4. Calculate the final temperature of 32 ml of ethanol initially at 11 degrees celcius upon absorption of 562 j of heat. (density of ethanol = 0.789 g/ml)
5. How much heat in kilojoules is required to heat 56 L of water from 85 degrees F to 212 degrees F?
6. A room contains 48 kg of air. How many kilowatt-hours of energy are necessary to heat the air in the house from 7 degrees celcius to 28 degrees celcius? The heat capacity of air is 1.03 j/g degrees celcius.