1. 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 90oC to 25oC ?   195.0 J   273.0 J   12.6 J   819.0 J   Hint Half-n-half Clue   2. The method of mixtures assumes that the heat lost by the hot body equals   the heat gained by the cold body   the heat gained by the hot body   the heat lost by the cold body   Half-n-half Clue   3. 1 Joule = _______ ergs   4.184   107   105   4.214   Half-n-half Clue   4. Water at 20oC is mixed with an equal mass of water at 60oC. If there are no heat losses to the surroundings, then what is the final temperature of the water mixture ?   40.0oC   60oC   20oC   80.0oC   Half-n-half Clue   5. Heat energy travels through _______ by conduction only.   gases   solids   liquids   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. The heat produced on burning 3 kg of fuel oil which has a calorific value of 39800 kJ/kg is   119.4 MJ   13.3 MJ   119400 MJ   13266.7 MJ   Half-n-half Clue