Question

How much heat energy is necessary to raise the temperature of 5 kg of water from 20°C to 100°C ?​

Answer 1

$\bf\large\underline\red{Answer:-}$

400 Kcal

Explanation:

Data : m = 5 , c = 1 kcal/kg ,

Delta T = 100 -20 = 80 Celsius

Q = m×c×delta T

= 5 ×1 × 80

= 400

Hence heat required is 400 kcal

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