Answer:
Correct answer: Q = E = 0.251 MJ
Explanation:
The transition from a liquid aggregate state to a solid crystalline one is called a phase transition.
The expression for the amount of phase transition heat or energy released in this case is:
Q = E = λ · m
Where λ is the specific heat of the phase transition and m is the mass of the liquid.
You should have offered that data for λ but well, that information is well known for ice at normal atmospheric pressure λ = 3.35 10⁵ J/kg
Q = E = 3.35 10⁵ · 0.75 = 2.51 10⁵ J = 0.251 10⁶ J = 0.251 MJ
Q = E = 0.251 MJ
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