1. _______ have the highest calorific value.   Proteins   Vitamins   Sugars   Carbohydrates   Fats   Hint Half-n-half Clue   2. 1 Joule = _______ ergs   4.214   107   105   4.184   Half-n-half Clue   3. 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 50.0 calories of heat are added to 4 g of water at 25oC ?   37.5oC   12.5oC   28.0oC   22.0oC   Half-n-half Clue   4. The heat supplied by a bunsen-burner flame on burning 5 m3 of gas which has a calorific value of 25000 J/m3 is   5000.0 kJ   125.0 kJ   125000kJ   5.0 kJ   Half-n-half Clue   5. Water at 35oC is mixed with an equal mass of water at 75oC. If there are no heat losses to the surroundings, then what is the final temperature of the water mixture ?   35oC   55.0oC   110.0oC   75oC   Half-n-half Clue   6. The calorific value of a fuel is the quantity of heat produced when a unit _______ of it is burnt.   mass   volume   weight   Half-n-half Clue   7. 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 9oC?   113.4 J   12.6 J   27.0 J   37.8 J   Half-n-half Clue