75.8 g liquid diethyl ether freeze -116.2℃

Determine the amount of energy given off

when 75.8 g of liquid diethyl ether freezes at –116.2℃.

The heat of fusion for diethyl ether is 7.27 kJ/mol.

How much energy is released

when 75.8 g of liquid diethyl ether freezes at –116.2℃?

The heat of fusion for diethyl ether is 7.27 kJ/mol.

액체 다이에틸 에터 75.8 g이

-116.2℃에서 얼 때 방출하는 에너지

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diethyl ether, (C2H5)2O의 몰질량 = 74.12 g/mol 이므로,

75.8 g / (74.12 g/mol) = 1.023 mol

다이에틸 에터의 융해열 = 7.27 kJ/mol 이므로,

1.023 mol × (7.27 kJ/mol) = 7.44 kJ

답: 7.44 kJ

[키워드] 다이에틸 에터의 융해열 기준, heat of fusion 기준