How much energy is needed to melt a 50 gram tin soldier taken at 25 C?
| March 26, 2021 | education
How much energy is needed to melt a 50 gram tin soldier taken at 25 C? Specific heat of tin 250 J / kg * C, temp. of tin melting 232 C, specific heat of fusion of tin 59000 J / kg.
1. Let’s write down the condition of the problem:
m = 50 g = 0.05 kg
t1 = 25 ° C
s = 250 J / kgx ° C
t2 = 232 ° C
λ = 59000 J / kg
Q-?
2. Let’s compose the formula for finding Q by adding the formulas for the heat required for heating and the heat required for melting the tin soldier:
Q = Q1 + Q2
Q = m x c x (t2 – t1) + m x λ
3. Substitute the numbers from the condition into the formula, calculate and find the answer:
Q = 0.05 kg x 250 J / kg x ° C x (232 ° C – 25 ° C) + 0.05 kg x 59000 J / kg
Q = 2587.5 + 2950
Q = 5537.5 J
4. Let’s write down the answer:
Answer: Q = 5537.5 J
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