Calculate the heat released when 454 grams of steam at 100 degrees c condenses.

1026.05 kJ

Explanation:The Quantity of heat is calculated by multiplying the mass of a substance by specific heat capacity and the change in temperature.However, condensation takes place at a constant temperature.Therefore, Quantity of heat is calculated by multiplying mass by the latent heat of vaporization.That is; Q = m × Lv

In this case we are given;

Mass of steam as 454 g

To calculate the amount of heat released we must know the value of latent heat of vaporization;

The latent heat of vaporization of steam is 2260 J/g

Therefore;

Heat released, Q = 454 g × 2260 J/g

                             =1026040 Joules

But, 1000 joules = 1 kilo-joules

Thus, Q = 1026.04 kJ

Hence, the amount of heat released is 1026.05 kJ

The molar mass of a substance is defined as the mass of 1 mol of that substance, expressed in grams per mole, and is equal to the mass of 6.022 × 10 23 atoms, molecules, or formula units of that substance.

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