Test Index

JAMB Physics 2015 Paper

© africaexams.com

Question : 32

Total: 66

A zinc has a heat capacity of 40 J/K, what is the mass of the zinc, given that the specific heat of zinc is 380 J/kg k

0.11kg
0.12kg
0.13kg
0.14kg

Solution:

Concept:

Heat capacity is the product of mass and specific heat capacity.

Explanation:

Given: heat capacity

C = 40 \, \text{J/K}

and specific heat capacity

c = 380 \, \mathrm{J/(kg \cdot K)}

.

Use the formula

C = mc

.

Rearrange to find mass:

m = \frac{C}{c}

.

Substitute the values:

m = \frac{40}{380}

.

Calculate:

m = 0.105 \, \text{kg}

.

Approximately,

m = 0.11 \, \text{kg}

.

Answer:

A.

0.11 \, \text{kg}

© africaexams.com

Go to Question:

Prev Question

Next Question