Problem: More heat is derived from cooling one gram of steam at 100°C to water at 50°C than from cooling one gram of liquid water at 100°C to 50°C because a) the steam is hotter than the water. b) the steam occupies a greater volume than the water.  c) the density of water is greater than that of steam.  d) the heat of condensation is evolved. 

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More heat is derived from cooling one gram of steam at 100°C to water at 50°C than from cooling one gram of liquid water at 100°C to 50°C because

a) the steam is hotter than the water.

b) the steam occupies a greater volume than the water. 

c) the density of water is greater than that of steam. 

d) the heat of condensation is evolved.