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A vacuum flask contains 0.4 kg liquid pa...

A vacuum flask contains 0.4 kg liquid paraffin whose temperature can be increased at the rate of `1^(@)C` per minute using an immersion heater of power 12.3 W. When a heater of 19.2 W is used to heat 0.5 kg of liquid paraffin, in the same flask, the rate of rise temperature is `1.2^(@)C` per minute.
What is specific heat of the paraffin?

A

`"0.529 cal.g"^(-1).^(@)C^(-1)`

B

`"0.429 cal.g"^(-1).^(@)C^(-1)`

C

`"0.472 cal.g"^(-1).^(@)C^(-1)`

D

`"0.623 cal.g"^(-1).^(@)C^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
A
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