Question

The heat of fusion for water is 80. cal/g. How many calories of heat are released when 20.0 g of water at 0°C is frozen to ice?

Answer 1

Answer:

1600 cal

Explanation:

The formula

q=mΔ$_{fus}$$H^{0}$

is used to calculate the heat required to melt a solid where q=amount of heat, m=mass and Δ$_{fus}$$H^{0}$ is the enthalphy of fusion

now we substitute, m=20g, Δ$_{fus}$$H^{0}$=80cal/g

Therefore, q=20g x 80cal/g =1600 cal

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