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3 years ago

Help plz:)))I’ll mark u Brainliest

Chemistry

1 answer:

finlep [7]3 years ago

7 0

Answer:

11690J

Explanation:

Use formula Q = mL

where:

Q = Energy (J)

m = Mass (g)

L = Latent heat of fusion for water (J/g) = 344J/g

Therefore:

Q = 35.0 x 344

Q = 11690J

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Answer: 26.5 mm Hg

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The vapor pressure is determined by Clausius Clapeyron equation:

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$P_1$ = initial pressure at $26.5^oC$ = ?

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$T_1$ = initial temperature = $26.5^oC=273+26.5=299.5K$

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Now put all the given values in this formula, we get

$\log (\frac{P_1}{100})=\frac{28000}{2.303\times 8.314J/mole.K}[\frac{1}{299.5}-\frac{1}{267.9}]$

$\log (\frac{P_1}{100})=-0.576$

$\frac{P_1}{100}=0.265$

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