How much heat is required to turn water weighing 5 kg at a temperature of 20 degrees into steam
| December 18, 2020 | education
How much heat is required to turn water weighing 5 kg at a temperature of 20 degrees into steam at a temperature of 100 degrees.
Given:
m = 5 kg
t1 = 20 ° С
t2 = 100 ° С
s = 4200 J / kg ° C
Q-?
Decision:
Q = сmΔt
Q = 4200 · 5 · (100 ° C-20 ° C) = 1 680 000 J = 1680 kJ
Answer: Q = 1680 kJ
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