Thermal Properties Of Matter Ques 40

40. Thermal capacity of $40$ $ g$ of aluminium $(s=0.2$ $cal / g K)$ is

[1990]

(a) 168 joule $/{ }^{\circ} C$

(b) 672 joule $/{ }^{\circ} C$

(c) 840 joule $/{ }^{\circ} C$

(d) 33.6 joule $/{ }^{\circ} C$

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Answer:

Correct Answer: 40.(d)

Solution:

  1. (d) Thermal capacity $=ms=40 \times 0.2=8$ $ cal /{ }^{\circ} C$ $=4.2 \times 8 J=33.6$ joules $/{ }^{\circ} C$


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