C. of sensible heat, and hence the water in the gaseous steam
form can have given up to the water at 0 deg. C. into which it was blown,
only the latent heat of gasification which was not sensible, but by
virtue of which it was enabled to assume the gaseous form. But if 0.187
kilogram of steam at 100 deg. C. can heat 1 kilogram of water through 100
degrees, then 1 kilogram of steam can raise 5.36 kilograms of ice-cold
water through 100 degrees, or 536 kilograms through 1 degree, and thus
the latent heat of steam is 536 heat units.
_Effect of Increase of Pressure on the Boiling of Water._--Now we have
referred to diminution of pressure and its effect on the boiling-point
of water, and I may point out that by increasing the pressure, such,
_e.g._, as boiling water under a high pressure of steam, you raise the
boiling-point. There are some industrial operations in which the action
of certain boiling solutions is unavailing to effect certain
decompositions or other ends when the boiling is carried on under the
ordinary atmospheric pressure, and boiling in closed and strong vessels
under pressure must be resorted to.
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