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Standard XII

Chemistry

Enthalpy

Heat required...

Question

Heat required to increase the temperature of $1 k g$ water by $20^{\circ} C$

83.72 kcal

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4.186 kcal

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20 kcal

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20 cal

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Solution

The correct option is C $20 kcal$ .
Heat required is: Q= $m c Δ T$
$Q = 1 \times 1000 \times 20 = 20 k c a l$

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Heat required to increase the temperature of 1kg water by 20∘C

The correct option is C 20 kcal.Heat required is: Q= mcΔTQ=1×1000×20=20 kcal

Heat required to increase the temperature of $1 k g$ water by $20^{\circ} C$

The correct option is C $20 kcal$ .
Heat required is: Q= $m c Δ T$
$Q = 1 \times 1000 \times 20 = 20 k c a l$