Question

Data: mass = 10 g, quantity of heat supplied = 120 J, rise in temperature = 10°C

STATEMENT A: The heat capacity of the substance is 12 J/g.

STATEMENT B: The specific heat capacity of the substance is 1.2 J/gK.

Options

• Only statement A is correct.

• Only statement B is correct.

• Both statements A and B are correct.

• Both statements A and B are incorrect.

Answer 1

Only statement B is correct.

Explanation:

Heat capacity (C') = `Q/(ΔT)`

= `120/10`

= 12 J °C⁻¹

Heat capacity is 12 J °C⁻¹ not 12 J/g.

Specific heat capacity (c) = `Q/(mΔT)`

= `120/(10 xx 10)`

= 1.2 J g⁻¹°C⁻¹

A temperature rise of 1°C equals a rise of 1 K.