Determine the amount of heat needed to melt 0.2 kg of ice at the melting point. Specific heat of melting of ice – 335 kJ / kg
| February 26, 2021 | education
Given:
m = 0.2 kilograms – the mass of ice that needs to be melted;
q = 335 kJ / kg = 335000 Joule / kilogram is the specific heat of melting of ice.
It is required to determine the amount of heat Q (Joule) required to melt the ice.
Since, according to the condition of the problem, the ice is already heated to the melting point, then:
Q = q * m = 335000 * 0.2 = 67000 Joules = 67 kJ.
Answer: to melt the ice, you need to spend an energy equal to 67 kJ.
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