An experiment takes 10 minutes to raise the temperature of water in a container from \( 0^{\circ....

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An experiment takes 10 minutes to raise the temperature of water in a container from \( 0^{\circ} \mathrm{C} \) to \( 100^{\circ} \mathrm{C} \)
\( \mathrm{P} \)
and another 55 minutes to convert it totally into steam by a heater supplying heat at a uniform rate. Neglecting the specific heat of the container and taking specific heat of water to be \( 1 \mathrm{cal} / \mathrm{g}{ }^{\circ} \mathrm{C} \), the heat of vapourization according to this experiment will come out to be:
(1) \( 560 \mathrm{cal} / \mathrm{g} \)
(2) \( 550 \mathrm{cal} / \mathrm{g} \)
(3) \( 540 \mathrm{cal} / \mathrm{g} \)
(4) \( 530 \mathrm{cal} / \mathrm{g} \)


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