1.

What do 1, 2, 3 and 4 in the processes shown below represent? \[Water\xrightarrow{1}Steam\xrightarrow{2}Water\] \[Ice\xrightarrow{3}Water\xrightarrow{4}Steam\]

A.  1-heat, 2-cool, 3-cool, 4-heat
B.  1-heat, 2-cool, 3-heat, 4-heat  
C.  Freezing
D.  1-cool, 2-cool, 3-heat, 4-cool
Answer» C.  Freezing


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