Chapter 23, Problem 25A

Calculate the energy released by 20 grams of $100°C$ steam that condenses to $100°C$ water.

To determine

To Calculate: The energy released by $\text{2}0\text{ g}$ of steam at $\text{1}00°\text{C}$ to condense into $\text{1}00°\text{C}$ water.

Answer to Problem 25A

45200 J

Explanation of Solution

Given info:

Mass of water, $m=20\text{g}$

The temperature of steam, $T=100\text{°C}$

Formula used:

The energy released is calculated as :

  $Q=mL$

Here, L is the latent heat of vaporization of water in J/g.

  $L=2260\text{J/g}$

Calculation:

Substituting the given values,

  $\begin{array}{c}Q=mL\\ Q=20\times 2260\\ =45200\text{J}\end{array}$

Conclusion:

The energy released by $\text{2}0\text{ g}$ of steam at $\text{1}00°\text{C}$ to condense into $\text{1}00°\text{C}$ water is 45200 J.