Question 1 (20 Marks) In an experiment to measure the temperature of the flame of a Bunsen burner, a lump of copper of
mass 0.12 kg is heated in the flame for several minutes. The copper is then transferred quickly to a
beaker, of negligible heat capacity containing 0.45 kg of water, and the temperature rise of the
water measured.
Given:
Specific heat capacity of water = 4200 J kg K
Specific heat capacity of copper = 390 J kg - K
A Determine
1) The temperature of the water rises from 15°C to 35°C. Calculate the thermal energy
gained by the water (5 Marks]
11) Calculate the temperature reached by the copper in the flame. Assume no heat is lost
when the copper is transferred. [5 Marks]
B. When the lump of copper entered the water, some of the water was turned to steam.
1) The specific latent heat of vaporisation of steam is 2.25MJ kg. What further
measurement would need to be made to calculate the energy used to produce this
steam? [5 Marks]
11) Without further calculation describe how this further measurement should be used
to obtain a more accurate value of the flame temperature. [5 Marks]​