Answer
During this condensation process, 396 kJ of heat were released.
Work Step by Step
1. Identify the objective.
- Find the number of kilojoules that are necessary to condense 175 g of steam at 100$^{\circ}$.
2. Find the conversion factors.
- To convert the mass in g to joules in a condensation process, we can use the Heat of Vaporization for water.
Page 79: $\frac{2260J}{1g}$ and $\frac{1g}{2260J}$
$1kJ =1000 J$
3. Using the conversion factors, calculate the necessary heat:
$175 g \times \times \frac{2260 J}{1g} \times \frac{1kJ}{1000kJ} = 395.5kJ$
4. Adjust the number to the correct number of significant figures.
- The used number that has the fewest number of significant figures is "175", with 3. Therefore, the result of the multiplication must have 3 SFs.
395.5 kJ = 396 kJ
5. Indicate whether heat was absorbed or released.
- During the condensation process, heat is released.