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ÄãûÓдð°¸Ã´?Ï£ÍûÄ㻹ÄÜ¿´µ½.answer supplied:
ns(Cp)air(T3-T1)+nw1(Cp)H2O(v)(T3-T1)+nwe(deltaHv)H2O=0.
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then, vaporization heat=sensible heat

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