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3 years ago

9

If the heating curve is reversed, what describes the boiling point?

1 answer:

GalinKa [24]3 years ago

5 0

Boiling is the process of converting a substance from liquid state to gaseous state. If the heating curve is reversed, the process also is reversed from converting gaseous state to liquid state. In this case, the reverse of boiling is condensation. So the answer is point of condensation.

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A gaseous mixture of O2 and N2 contains 37.8% nitrogen by mass. What is the partial pressure of oxygen in the mixture if the tot

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Answer: The partial pressure of oxygen in the mixture if the total pressure is 525 mmHg is 310 mm Hg

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mass of nitrogen = 37.8 g

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Using the equation given by Raoult's law, we get:

$p_A=\chi_A\times P_T$

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$\chi_{O_2} = mole fraction of O_2=\frac{\text{Moles of }O_2}{\text{Total moles}}$

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${\text{Moles of }N_2}=\frac{\text {Given mass}}{\text {Molar mass}}=\frac{37.8g}{28g/mol}=1.35moles$

Total moles = 1.94 + 1.35 = 3.29 moles

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