Question

How much energy is needed to heat 80 grams of water from 10 °C TO 55 °C at constant Pressure?​

Answer 1

Answer:

Energy required to heat 1.5 kg water from 20 degrees C to 80 degrees C.

Specific heat of water = 1 cal/gram-deg C

1.5 kg = 1,500 grams.

Energy required = 1500 * 60 * 1

= 90,000 calories = 90 kcal.

1 kilocalorie = 4184 joules

Energy required = 90 * 4184

= 376,560 joules = 376.6 kjoules

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