)How much heat must be added to 5.0kg Aluminum to change it from solid at 200 °c
ID: 1731317 • Letter: #
Question
)How much heat must be added to 5.0kg Aluminum to change it from solid at 200 °c to a liquid at 660 °C (its melting point)? (Heat of Fusion for Aluminum 40x105 Jkg. Specific heat ofAluminum-921 J/kg) A termos contains 200 cm? of coffee (assume density of coffee = 1.0 gm cm) at temperature 60 °C To cool the coffee two (2) 15 gm ice cubes are dropped in the thermos The ice cubes are initially at O °C and melt completely What is the final temperature of ii) the coffee? dditional Review Please review homework problems These problems will prepare you for the testExplanation / Answer
1) Heat required = heat required to move from 200 to 660 at solid + latent heat required
= mcdT + mL
= 5*(921*(660-200) + 4*10^5)
= 4118300 J
= 4118.3 kJ
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