If water absorbs 4000 joule heat to increase ...

ICSE Class 10 Physics 2022 Paper

Section-A

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Question : 7 of 45

Marks: +1, -0

If water absorbs 4000 joule heat to increase the temperature of

1\,\text{kg}

water through

1^{\circ}\,\text{C}

then the specific heat capacity of water is :

Solution:

(c)

4\,\mathrm{Jg}^{-1}\,{}^{\circ}\mathrm{C}^{-1}

Explanation :

\theta=4000\,\mathrm{J}, m=1\,\mathrm{kg}=

1000\,\mathrm{g}

\Delta T=1^{\circ}\,\mathrm{C}

\; \because \;\; \theta=m c \Delta T

\; \therefore \;\; c=\frac{\theta}{m \Delta T}=\frac{4000}{1000 \times 1}

=4\,\mathrm{Jg}^{-1}\,{}^{\circ}\mathrm{C}^{-1}

\;

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