What energy is needed to obtain water from a 1 kg piece of ice with a temperature of 0 degrees?
| September 9, 2021 | education
m = 1 kg.
λ = 3.4 * 10 ^ 5 J / kg.
t = 0 ° C.
Q -?
Specific heat of fusion λ is the amount of heat energy Q that is needed to melt 1 kg of a substance taken at the melting temperature.
Since ice is taken at a temperature of t = 0 ° C, this is the melting point. From the table of specific heat of melting of substances, the specific heat of melting of ice is λ = 3.4 * 10 ^ 5 J / kg.
Q = λ * m.
Q = 3.4 * 10 ^ 5 J / kg * 1 kg = 3.4 * 10 ^ 5 J.
Answer: to obtain water from ice, you need Q = 3.4 * 10 ^ 5 J of thermal energy.
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