50 g benzaldehyde vapour is condensed at 179°C, What is the enthalpy of the liquid relative to the vapour?Given: The molecular weight of benzaldehyde is 106.12, the normal boiling point is 179.0°C and the standard heat of vaporization is 38.40 kJ gmol-1. For condensation the latent heat is – 38.40 kJ gmol-1.

50 g benzaldehyde vapour is condensed at 179°C, What is the enthalpy

1.	50 g benzaldehyde vapour is condensed at 179°C, What is the enthalpy of the liquid relative to the vapour?Given: The molecular weight of benzaldehyde is 106.12, the normal boiling point is 179.0°C and the standard heat of vaporization is 38.40 kJ gmol-1. For condensation the latent heat is – 38.40 kJ gmol-1.
A.	-18.09 kJ
B.	-17.09 kJ
C.	– 18.06 kJ
D.	– 17.06 kJ
Answer» B. -17.09 kJ

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50 g benzaldehyde vapour is condensed at 179°C, What is the enthalpy of the liquid relative to the vapour?Given: The molecular weight of benzaldehyde is 106.12, the normal boiling point is 179.0°C and the standard heat of vaporization is 38.40 kJ gmol-1. For condensation the latent heat is – 38.40 kJ gmol-1.
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