Q2 The specific heat capacity of aluminium was found by adding hot aluminium to water in a copper calorimeter. The following data was recorded.
mass of calorimeter 63.0 g
mass of calorimeter water 152.3 g mass of aluminium calorimeter water 185.5 g initial temperature of water temperature of hot aluminium final temperature of water
100 C 21.0 C
(i) Describe how the aluminium was heated and how its temperature was measured. (ii) Use the energy gained by the water to calculate the specific heat capacity of aluminium. (iii) Explain why adding a larger mass of aluminium would improve the accuracy of the experiment. (iv) Give two other precautions that should be taken to ensure a more accurate result.
(9)
(19) (3) (9)
(specific heat capacity of copper 390 J kg1 K1, specific heat capacity of water 4 180 J kg1 K1)
Q3 In an experiment to measure the specific latent heat of fusion of ice, warm water was placed in a copper calorimeter. Ice, at 0 C, was added to the warm water and the following data was recorded.
mass of calorimeter
mass of calorimeter and water at the start of experiment mass of calorimeter and water at the end of experiment temperature of warm water
temperature of water after adding ice
(i) What did the student do with the ice before adding it to the water? (ii) Calculate the mass of the ice used.
(iii) Calculate a value for the specific latent heat of fusion of ice.The specific heat capacity of copper is 390 J kg1 K1 and the specific heat capacity of water is 4 180 J kg1 K1.
(iv) Why was the water initially heated to roughly 7 C above room temperature? (v) Give one other precaution that should be taken to ensure a more accurate result.
58.1 g
163.2 g 180.5 g
27.1 C 12.8 C
(6) (6)
(18) (6) (4)
Q4 In an experiment to measure the specific latent heat of vaporisation of water,cool water was placed in a copper calorimeter. Steam was added to the cool water and the following data was recorded.
mass of calorimeter
temperature of cool water temperature of steam
final temperature of water 51.3 g
mass of calorimeter water 100.3 g mass of steam
11 C 100 C 26.0 C
(i) Why was dry steam used? How was the steam dried? (ii) Describe how the mass of the steam was found.
