Answer to Question #165795 in Chemistry for Ava Brooke

Question

A 15 gram sample is heated by 11.61 joules the result is an increase of 6 ^oC. What is the material the sample is made of?

Answer 1

Solution:

q = m × C × ΔT

where:

q = amount of heat energy gained or lost by substance (J)

m = mass of sample (g)

C = specific heat capacity (J ^oC^-1 g^-1)

ΔT = change in temperature (^oC)

 

Thus:

11.61 J = 15 g × C × 6^oC

С = 11.61 J / (15 g × 6^oC)

C = 0.129 J ^oC^-1 g^-1

The calculated specific heat capacity (C = 0.129 J ^oC^-1 g^-1) corresponds to specific heat capacity of gold (Au).

Hence, the sample is made of gold (Au).

Answer: The sample is made of gold (Au).