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Question

Calculate the vapor pressure of 0.5 molal AQ solution of sucrose at 100 degree Celsius

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Solution

P0 - PP0 = W2× M1M2×W1 ------1But molality (m) = W2× 1000M2×W1 W2M2×W1 = m1000Substitute the above in equation 1P0 - PP0 = m× M11000 vp of water at 100 0C is 1 bar1 - P1 = 0.5× 1810001-P = 0.009P = 1 - 0.009 = 0.991 bar

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