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Topic: Chemical Properties Problems  (Read 1980 times)

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Offline tmlfan_17

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Chemical Properties Problems
« on: October 12, 2013, 04:17:24 PM »
Hi there, I was hoping that someone could solve the following problems (and provide an answer), in order to see if I got the same solutions. Your final answer is all that would be appreciated.

1. When another atom or group of atoms is substituted for one of the hydrogen atoms in benzene, C6H6, the boiling point changes. Explain the order of the following boiling points: C6H6, 80°C; C6H5Cl, 132°C; C6H5Br, 156°C; C6H5OH, 182°C.
2. (a) What are the partial and total vapour pressures of a solution obtained by mixing 35.8 g benzene, C6H6 (l), and 56.7 g toluene, C7H8 (l), at 25 °C? At 25 °C, the vapour pressure of liquid  C6H6 = 95.1 mmHg; the vapour pressure of liquid C7H8 = 28.4 mmHg.
(b) Determine the mole fraction of benzene in the vapour above this benzene–toluene solution.

Offline Borek

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Re: Chemical Properties Problems
« Reply #1 on: October 12, 2013, 05:22:51 PM »
You have to show your attempts at solving the question to receive help. This is a forum policy.

So, show us YOUR answer (preferably explaining how you got it), and with some luck someone will try to solve the problem and tell you whether he got the same result.
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