Question

Part A

A copper pot of mass 2.5 kg contains 5.2 litres of water (i.e. 5.2 kg) at room temperature (20⁰C). An iron block of mass 9.4 kg is dropped into the water and when the system comes into thermal equilibrium, a temperature of 38⁰C is measured. What is the initial temperature of the iron block? Give your answer in ^oC to three significant figures.

Part B

Iron has a specific heat that is larger than that of copper. A cube of copper and a cube of iron, both of equal mass and initially both a 10 ⁰C are placed in two identical Styrofoam cups (negligible specific heat) that each contain 100 ml of water at 30⁰ C. After thermal equilibrium has been attained,

Group of answer choices

the temperature of the copper is higher than that of iron.

the temperature of the copper is equal to that of iron.

the temperature of the copper is lower than that of iron.

Part C

If you mix 100 g of ice at 0 ^oC with 100 g of boiling water at 100 ^oC in a perfectly insulated container (of negligible heat capacity), what will be the final stabilized temperature? Give your answer in ^oC to three significant figures.

Material	Specific heat (J/(kg 0C))	Heat of vaporization (J/kg)	Heat of fusion (J/kg)
Water	4186	2.26 x 106	3.34 x 105
Copper	386	5.07 x 106	1.34 x 105
Iron	450	6.09 x 106	2.72 x 105

Answer 1