Problem: How much steam at 100* is needed to just melt 5Kg of ice at- -15*C

Physics for Scientists and Engineers, Technology Update (No access codes included)
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Author:Raymond A. Serway, John W. Jewett
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Chapter20: The First Law Of Thermodynamics
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Hi. Pls explainn the solution step by step. Where the numbers came from

Problem: How much steam at 100* is needed to just melt 5Kg of ice at -
-15*C
Heat loss= Heat gain
Heat condense steam + Heat loss of water= Heat gain of ice + heat of
melt ice.
mteam Lv + m steam Cwater Change in T= mice Cice Change in T+ mice 4
m
steam
22.5 105+m steam *4200* (100-0)=5*2300* ( 0-(-15)
+5*3.34* 105
2.67 * 106
= 1.84*106
steam
p.69kg
m
steam
Transcribed Image Text:Problem: How much steam at 100* is needed to just melt 5Kg of ice at - -15*C Heat loss= Heat gain Heat condense steam + Heat loss of water= Heat gain of ice + heat of melt ice. mteam Lv + m steam Cwater Change in T= mice Cice Change in T+ mice 4 m steam 22.5 105+m steam *4200* (100-0)=5*2300* ( 0-(-15) +5*3.34* 105 2.67 * 106 = 1.84*106 steam p.69kg m steam
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