Question

2kg Water vapor 100°C is condensed to water at 40°C . The quantity of heat released is ______

Answer 1

Answer :

Mass of water = 2kg = 2000g

Initial temperature = 100°C

Final temperature = 40°C

We have to find amount of heat released$.$

★ Specific heat capacity is measured as the amount of heat required to increase temperature of 1g substance by 1°C.

• Q = m × s × ∆T

Q denotes heat energy

m denotes mass

s denotes specific heat capacity

∆T denotes change in temperature

SHC of water = 1 cal/g °C

⭆ Q = m × s × ∆T

⭆ Q = 2000 × 1 × (100-40)

⭆ Q = 2000 × 60

⭆ Q = 120000cal = 120kcal

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