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Q1

. Specific heat capacity of water: 4180 Jkg-1 K-1 . Specific heat capacity of aluminium: 880 Jkg-1 K-1 . Specific heat capacity of iron: 435 J kg ' K-1 Specific heat capacity of paraffin oil: 2130 Jkg- K-1 These specific heat capacities can also be found within the hint tabs. If I add 210 g of rivets at 303 'C made of some unknown metal to 500 g of water at 15 .C, and the final temperature is 34 C, what is the specific heat capacity of the mystery metal? Give your answer to 2 significant figures.Part A Frozen pipe Afrozen pipe contains 5.60 kg of ice. How much energy is needed to melt it without changing its temperature? Value 1880 ? Part B Warming and melting If the ice were initially at 3.5 C, how much energy would be taken to warm it to melting point and then melt it? Value Units |: . Specic heat capacity of water: 4180 J kg'1 K1 . Specic heat capacity of ice: 2030 J kg"1 Kl - Specic latent heat of fusion of ice: 3.35 x 105 J kg'l - Specic latent heat of vaporization of water: 2.26 x 106 J kgl In all questions, assume that the heat capacities given above remain constant at all temperatures. Calculate the ratio between the energy needed to vaporize a certain quantity of water, and the energy needed to heat that same quantity of water from the freezing point to the boiling point (without boiling it). Give your answer as a positive number greater than 1, to 3 signicant figures. . Specic heat capacity of water: 4180 J kg'1 K1 . Specic heat capacity of ice: 2030 J kg'1 K1 - Specic latent heat of fusion of ice: 3.35 x 105 J kg'l . Specic latent heat of vaporization of water: 2.26 x 106 J kgl In all questions, assume that the heat capacities given above remain constant at all temperatures. 2.25 kg of ice, initially at 40 C, is heated using a 3.2 kW heater without loss to the surroundings. Part A Time to reach melting point How much time elapses before the ice reaches melting temperature? Give your answer in seconds. Part B Time to melt How much more time elapses before the ice has all melted (after it has reached melting temperature)? Give your answer in seconds