Question

What amount of heat is required to raise the temperature of 5 kg of water through 20°C?

Answer 1

$\huge\underline\red{answer : - }$

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Solution :

 

Given :

m=5 kg, c=1 kcal/kg^C Change in temperature (DeltaT)=100-20 =80^C

To Find :

Heat energy needed to raise the temperature

Solution :

Energy to be supplied to water = energy gained by water

= mass of water x specific heat of water change in temperature of water

= 5 x 1 x 80 = 400 kcal Hence, the heat energy necessary to raise the temperature of water is 400 kcal.

The final answer:

400 kcal.

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