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Calculate the amount of heat energy to b...

Calculate the amount of heat energy to be supplied to convert 2 kg of ice at `0^@C` completely into water at`0^@C` if latent heat of fusion for ice is 80 cal/g.

Text Solution

Verified by Experts

The correct Answer is:
Heat energy to be supplied is 160 kcal.
Given Mass (m) `=2 kg =2 xx 10^3 g`, latent
heat of fusion for ice (L) = 80 cal /g .
To find , Heat energy (Q)
Formula : Q=mL
Calculation: Formula formula,
`Q= 2 xx 10^3 xx 80 = 160000 cal `
= 160 kcal .
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Knowledge Check

  • 1 kg of ice at 0^(@)C is mixed with 1.5 kg of water at 45^(@)C [latent heat of fusion = 80 cal//gl. Then

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    D
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