How much heat energy must be removed from 150 g of oxygen at 21°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. )

Question

How much heat energy must be removed from 150 g of oxygen at 21°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. )
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The Answer of How much heat energy must be removed from 150 g of oxygen at 21°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. )
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How Much Heat Energy Must Be Removed from 150 G