How Much Heat Energy Must Be Removed from 250 G

Multiple Choice

How much heat energy must be removed from 250 g of oxygen at 21.0°C to liquefy it at −183°C? (The specific heat of oxygen gas is 0.218 cal/g⋅°C,and its heat of vaporization is 50.9 cal/g. )

A) 4.8E+4 cal
B) 2.4E+4 cal
C) 6.0E+3 cal
D) 1.2E+4 cal
E) 3.6E+4 cal