Chemistry, 01.10.2019 05:00 detrickboucicaut
Acertain liquid has a vapor pressure of 92.0 torr at 23.0 °c and 351.0 torr at 45.0 °c. calculate the value of δh°vap for this liquid.
Answers: 1
is 47.627 kJ/mol![\ln(\frac{P_2}{P_1})=\frac{\Delta H_{vap}}{R}[\frac{1}{T_1}-\frac{1}{T_2}]](/tpl/images/0278/8132/b9a49.png)
= vapor pressure at temperature 
= 92 torr
= vapor pressure at temperature 
= 351 torr
= initial temperature = ![23^oC=[23+2730]K=296K](/tpl/images/0278/8132/46201.png)
= final temperature = ![45^oC=[45+2730]K=318K](/tpl/images/0278/8132/1a9ea.png)
![\ln(\frac{351torr}{92torr})=\frac{\Delta H_{vap}}{8.314J/mol.K}[\frac{1}{296}-\frac{1}{318}]\\\\\Delta H_{vap}=47627.347J/mol=47.627kJ/mol](/tpl/images/0278/8132/e398e.png)
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Acertain liquid has a vapor pressure of 92.0 torr at 23.0 °c and 351.0 torr at 45.0 °c. calculate th...
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