-Based on the figure above, the boiling point of ethyl alcohol under an external pressure of 0.658 atm is ________ °C.
A)20
B)40
C)60
D)80
E)70

Question

-Based on the figure above, the boiling point of ethyl alcohol under an external pressure of 0.658 atm is ________ °C.
A)20 
B)40 
C)60 
D)80 
E)70

Quizplus · Accepted Answer

The boiling point of a liquid decreases as the external pressure decreases. Therefore, the boiling point of ethyl alcohol under an external pressure of 0.658 atm is lower than its boiling point at 1 atm. The boiling point of ethyl alcohol at 1 atm is 78.3 °C. Therefore, the boiling point of ethyl alcohol under an external pressure of 0.658 atm is approximately 70 °C.

-Based on the Figure Above, the Boiling Point of Ethyl