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Calculate the amount of heat required to...

Calculate the amount of heat required to convert 10g of water at `30^(@)C` into steam at `100^(@)C ` . ( Specific latent heat of vaporization of water `= 540 cal//g ` )

Text Solution

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Here, `m = 10g , c = 1 cal //g . ^(@)C `
`T_(2) - T_(1) = 100^(@)C - 30^(@)C =70^(@)C, L = 540 cal//g , Q =?`
Amount of heat required , `Q = m c ( T_(2) - T_(1)) + mL `
`= 10 g xx 1 cal //g .^(@)C xx 70^(@)C +10g xx540 cal //g `
`= 700 cal + 500 cal`
`:.` Q = 6100 calories.
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