Mole-Mass-Volume Relationships?

[Jerome]

1. A gas occupies 22.4 L at 2.50 atm and 27 degree Celsius. What will be its volume at 1.50 atm and - 5.00 degree Celsius?

2. A 25 L sample of N2 is at 19 degree Celsius and 1.5 atm. What will be the new temperature in degree Celsius when the volume changes to 1.5 L and the pressure to 765 torr?

3. What would be the partial pressure of N2 gas collected over water at 25 degree Celsius and 705 torr pressure? Check vapor pressure of water.

VAPOR PRESSURE OF WATER
Temperature --------------- Vapor pressure
(Celsius) (Torr)
0 ------------- 4.6
5 ------------- 6.5
10 ------------- 9.2
15 --------------- 12.8
16 -------------------- 13.6
17 ----------------------- 14.5
18 ------------ 15.5
19 -------------- 16.5
20 ----------------- 17.5
21 ---------------- 18.6
22 ---------------- 19.8
23 ----------------- 21.2
24 ---------------------- 22.4
25 -------------------------- 23.8
26 ------------- 25.2
27 --------------- 26.7
28 ------------------ 28.3
29 -------------- 30.0
30 ------------ 31.8
40 ---------- 55.3
50 -------------- 92.5
60 -------------- 149.4
70 ---------------- 233.7
80 ----------------- 355.1
90 ------------ 525.8
100 ------------ 760.0
110 ------------ 1074.6