## anonymous 2 years ago A certain liquid has a vapor pressure of 92.0 Torr at 23.0 °C and 313.0 Torr at 45.0 °C. Calculate the value of ΔH°vap for this liquid. Calculate the normal boiling point of this liquid. How would I do this? Please help

1. anonymous

@Rohitkhanna

2. petiteme

Should you use Clausius-Clapeyron equation?

3. anonymous

do I just solve for T2 and use the same values?

4. petiteme

Well, let the normal boiling point be T2

5. anonymous

wouldn't that just give me the T that is given in the question ?

6. petiteme

Nope. Sorry :/ I suck at explaining chemistry

7. anonymous

i just get a very small number

8. petiteme

What did you get for ΔH°vap?

9. anonymous

im not good at chemistry but let's try

10. anonymous

43.55 kj/mol

11. petiteme

I used $\log\frac{ P2 }{ P1 }=\frac{ ΔH }{2.303R }*(\frac{ 1? }{ T1 }-\frac{ 1 }{ T2 })$

12. petiteme

Erase the ?

13. anonymous

what is v?

14. petiteme

I got 49.78kj

15. petiteme

Lol. I don't know if i'm right. Ignore me :))

16. anonymous

volume i dont know if that's right , it's been i while i dont see chemistry

17. anonymous

lol

18. anonymous

sing those number? i dont have V so i dont think i can use that

19. petiteme

You saw my equation?

20. anonymous

yea

21. petiteme

Have you tried it?

22. anonymous

yea...and i got 43.55...its ok..i will do the question tmr...im just really tired now

23. petiteme

Okies. Just close this question ^_^