The graph shown in the figure represent change in the
\( \mathrm{P}...
The graph shown in the figure represent change in the
\( \mathrm{P} \) temperature of \( 5 \mathrm{~kg} \) of a substance as it abosrbs heat
W at a constant rate of \( 42 \mathrm{~kJ} \mathrm{~min}^{-1} \). The latent heat of vapourazation of the substance is :
(1) \( 630 \mathrm{~kJ} \mathrm{~kg}^{-1} \)
(2) \( 126 \mathrm{~kJ} \mathrm{~kg}^{-1} \)
(3) \( 84 \mathrm{~kJ} \mathrm{~kg}^{-1} \)
(4) \( 12.6 \mathrm{~kJ} \mathrm{~kg}^{-1} \)
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