The mass of silver is 10 g. How much energy will be released during its crystallization

The mass of silver is 10 g. How much energy will be released during its crystallization and cooling to 60 ° C, if silver is taken at the melting temperature?

Given:
m = 10 g. Let’s translate it into a more convenient form. m = 10 * 10 ^ -3 kg.
t melting = 960 degrees.
T1 = 60 degrees.
Lambda = 10 * 10 ^ 4 J / kg.
s = 250 J / kg * C.
Find: Q – amount of heat.
Decision:
1) We will use the rule that the released energy is equal to the sum of the energies released during crystallization and then during cooling.
Q = Q1 + Q2 or Q = cm (melting t – t1) + lambda * m.
2) Substitute the known values.
Q = 250 * 10 * 10 ^ -3 * (960-60) + 10 * 10 ^ 4 * 10 * 10 ^ 3 = 2250 + 1000 = 3250 J.
Answer: 3250