Question

A 200.0 gram piece of silver (Ag) is initially at 25°C. It is then heated by addition of 3.6 kilojoules of energy. What is the final temperature of the silver? The specific heat of silver is 0.240 J/(g·°C).

Answer 1

Final temperature = 100°C

Step-by-step explanation:

The general equation of a coffee cup calorimeter is:

Q = m×C×ΔT

Where Q is the heat added to the system (3.6kJ = 3600J), m is the mass of the substance (200.0g), C is specific heat (0.240J /g°C) and ΔT is change in temperature).

Computing the values:

3600J = 200.0g×0.240J/(g°C)×ΔT

75°C = ΔT

ΔT is the difference in temperature between final and initial temperature. As intital temperature was 25°C:

75°C = Final T - 25°C

Final temperature = 100°C