The minimum number of joules needed to change 40.0 g of the liquid to vapor at the boiling point is 53600 J
The correct answer to the question is Option D. 53600 J
From the question given above, the following data were obtained:
Heat of Vaporisation (Hᵥ) = 1340 J/g
Mass (m) = 40 g
Heat (Q) =?
The heat needed can be obtained as follow:
Q = m•ΔHᵥ
Q = 40 × 1340
Q = 53600 J
Therefore, 53600 J of heat is needed change 40 g of the liquid to vapor at the boiling point.
Thus, Option D. 53600 J gives the correct answer to the question.
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