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samueladesida43

The mass of water that can be heated from 20°C to 100°C by 650,000J of energy is 1943.78grams

SPECIFIC HEAT CAPACITY:

  • The specific heat capacity of a substance is calculated using the following formula:

  • Q = m × c × ∆T

Where;

Q = quantity of heat absorbed/released (cal)

m = mass of the substance (g)

c = specific heat (J/g°C)

∆T = change in temperature (°C)

  • From the information given in this question;

m = ?

c = 4.18 J/g°C

∆T = 100°C - 20°C = 80°C

Q = 650,000J

m = Q ÷ c∆T

m = 650000 ÷ (4.18 × 80)

m = 650000 ÷ 334.4

m = 1943.78grams.

Therefore, the mass of water that can be heated from 20°C to 100°C by 650,000J of energy is 1943.78grams.

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