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Byju's Answer

Standard XII

Chemistry

Internal Energy

1 g of a stea...

Question

1 g of a steam at $100^{_{-}^{0}} C$ melt how much ice at $0^{_{-}^{0}} C$ ? (Latent heat of ice = 80 cal/gm and latent heat of steam = 540 cal/gm)-

1 gm

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2 gm

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4 gm

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8 gm

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Solution

The correct option is D 8 gm
Suppose $m$ gm ice melted,
then heat required for its melting = $m L = m \times 80 c a l$ .
heat avaiable with steam for being condensed and then brought to $0^{\circ} C .$
$= 1 \times 540 + 1 \times 1 \times (100 - 0) = 640 c a l$
⇒ heat lost = heat taken
⇒ $640 = m \times 80 \Rightarrow m = 8 g m$ .

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1 g of a steam at 1000−C melt how much ice at 00−C? (Latent heat of ice = 80 cal/gm and latent heat of steam = 540 cal/gm)-

The correct option is D 8 gmSuppose m gm ice melted, then heat required for its melting = mL=m×80cal.heat avaiable with steam for being condensed and then brought to 0∘C.=1×540+1×1×(100−0)=640cal⇒ heat lost = heat taken⇒640=m×80⇒m=8gm.

1 g of a steam at $100^{_{-}^{0}} C$ melt how much ice at $0^{_{-}^{0}} C$ ? (Latent heat of ice = 80 cal/gm and latent heat of steam = 540 cal/gm)-