1. Given that 1 cal (about 4.2 J) of heat is required to raise the temperature of 1 g of water by 1oC, what will be the final temperature when 25.0 calories of heat are added to 2 g of water at 26oC ?   23.0oC   38.5oC   29.0oC   13.5oC   Hint Half-n-half Clue   2. Given that 1 cal (about 4.2 J) of heat is lost by 1 g of water in cooling by 1oC, how much heat is lost by 3 g of water in cooling from 75oC to 15oC ?   180.0 J   252.0 J   12.6 J   756.0 J   Half-n-half Clue   3. The calorific value of a fuel is the quantity of heat produced when a unit _______ of it is burnt.   weight   mass   volume   Half-n-half Clue   4. Given that 1 cal (about 4.2 J) of heat is required to raise the temperature of 1 g of water by 1oC, how much heat is required to raise the temperature of 3 g of water by 8oC?   33.6 J   24.0 J   12.6 J   100.8 J   Half-n-half Clue   5. _______ have the highest calorific value.   Vitamins   Proteins   Carbohydrates   Fats   Sugars   Half-n-half Clue   6. The SI unit of heat (thermal energy) is   Watt   Joule   Pascal   Newton   Half-n-half Clue   7. A mass of 50 kg falls 80m. If all its potential energy is converted to heat and gravitational acceleration = 9.8 m/s2, then the heat gained is   784 J   4000 J   490 J   39200 J   Half-n-half Clue