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Grade 12Thermal Physics

Work done in converting 1 gram of ice at -10C into steam at 100C is ?
A 3045 J
B 6056J
C 721 J

Profile image of Noman
8 Years agoGrade 12
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1 Answer

Profile image of Arun
8 Years ago
m=1gram
The change takes place as-
-10°C(ice)---0°C(ice)---0°C(water)---100°C(water)---100°C(steam)
Tip:When state changes temperature doesn't Use energy=ms?(theta) when temperature changes and energy=mL when the state changes
-10°C(ice)to 0°C(water)=ms?(theta)=5cal
0°C(ice)to 0°C(water)=mL=80cal
0°C(water)to 100°C(water)=100cal
100°C(water)to 100°C(steam)=540cal
Total=725cal=3045joules
 

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