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Standard XII

Chemistry

Molar and Specific Heat Capacity

How much heat...

Question

How much heat is required to change $10 g$ ice at $0^{o} C$ to steam at $100^{o} C$ ? Latent heat of fusion and vaporization for $H_{2} O$ are $80 c a l / g$ and $540 c a l / g$ respectively. Specific heat of water is $1 c a l / g$ .

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Solution

Total heat absorbed
$Δ H_{f u s i o n} + Δ H_{t e m p . r i s e} + Δ H_{v a p .} = 10 \times 80 + 10 \times 1 \times 100 + 10 \times 540 = 7200 c a l$

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How much heat is required to change 10 g ice at 0oC to steam at 100oC? Latent heat of fusion and vaporization for H2O are 80 cal/g and 540 cal/g respectively. Specific heat of water is 1 cal/g.

Total heat absorbedΔHfusion+ΔHtemp.rise+ΔHvap.=10×80+10×1×100+10×540=7200cal

How much heat is required to change $10 g$ ice at $0^{o} C$ to steam at $100^{o} C$ ? Latent heat of fusion and vaporization for $H_{2} O$ are $80 c a l / g$ and $540 c a l / g$ respectively. Specific heat of water is $1 c a l / g$ .

Total heat absorbed
$Δ H_{f u s i o n} + Δ H_{t e m p . r i s e} + Δ H_{v a p .} = 10 \times 80 + 10 \times 1 \times 100 + 10 \times 540 = 7200 c a l$