A vacuum flask contains 0.4 kg liquid paraffin whose temperature can be increased at the rate of 1^(@)C per minute usingan 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 the thermal capacity of the material of the flask?

A vacuum flask contains 0.4 kg liquid paraffin whose temperature can b

1.	A vacuum flask contains 0.4 kg liquid paraffin whose temperature can be increased at the rate of 1^(@)C per minute usingan 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 the thermal capacity of the material of the flask?
Answer» `"17.67 CAL".^(@)C^(-1)` `"16.85 cal".^(@)C^(-1)` `"17.01 cal".^(@)C^(-1)` `1"16.63 cal".^(@)C^(-1)` ANSWER :B