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The specific heat of a substance varies ...

The specific heat of a substance varies with temperature `t(.^(@)C)` as
`c=0.20+0.14t+0.023t^2 (cal//g^(@)//C)`
The heat required to raise the temperature of 2 g of substance from `5^@C` to `15^@C` will be

A

24 cal

B

56 cal

C

82 cal

D

100 cal

Text Solution

Verified by Experts

The correct Answer is:
C
`Q = underset(theta_(1)) overset(theta_(2)) int m xx S xx d theta`
`Q = 2 underset(5) overset(15) int(0.2 + 0.14 theta + 0.023 theta^(2)) d theta`.
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