Answer
During this process, 91900 J of heat were released.
Work Step by Step
1. Identify the objective.
- Find the number of joules that are necessary to freeze 275 g of water at 0$^{\circ}$.
2. Find the conversion factors.
- To convert the mass in g to joules in a freezing process, we can use the Heat of Fusion for water.
Page 76: $\frac{334 J}{1g}$ and $\frac{1g}{334 J}$
3. Using the conversion factor, calculate the necessary heat:
$275g \times \frac{334 J}{1g} = 91850 J$
4. Adjust the number to the correct number of significant figures.
- The used number that has the fewest number of significant figures is "275", with 3. Therefore, the result of the multiplication must have 3 SFs.
91850 J = 91900 J
5. Indicate whether heat was absorbed or released.
- During the freezing process, heat is released.
You can check this information on page 76.