Qualification > Sciences
ALL CIE CHEMISTRY DOUBTS HERE !!
Dania:
Thanks :) I have a MCQ also:
The density of ice is 1.00 g cm–3.
What is the volume of steam produced when 1.00 cm3 of ice is heated to 323 °C (596 K) at a
pressure of one atmosphere (101 kPa)?
[1 mol of a gas occupies 24.0 dm3 at 25 °C (298 K) and one atmosphere.]
A 0.267 dm3
B 1.33 dm3
C 2.67 dm3
D 48.0 dm3
The answer is C. How would I obtain it? I'm not sure what equation to use.
Deadly_king:
--- Quote from: Danii on October 07, 2010, 05:47:44 pm ---Thanks :) I have a MCQ also:
The density of ice is 1.00 g cm–3.
What is the volume of steam produced when 1.00 cm3 of ice is heated to 323 °C (596 K) at a
pressure of one atmosphere (101 kPa)?
[1 mol of a gas occupies 24.0 dm3 at 25 °C (298 K) and one atmosphere.]
A 0.267 dm3
B 1.33 dm3
C 2.67 dm3
D 48.0 dm3
The answer is C. How would I obtain it? I'm not sure what equation to use.
--- End quote ---
First you need to find the number of moles present in 1cm3 of ice.
Using density = 1gcm-3, we take the mass present in 1 cm3 of ice to be 1g.
Number of moles = Mass/Mr ----> Number of moles = 1/18 = 0.0556
Now we use the formula for ideal gas ---> PV = nRT
V = (0.0556 x 8.31 x 596)/(101 x 103) = 0.0027m3
This is equal to 2.7dm3
Am not sure though.........since I did not obtain 2.67 dm3 :-[
nid404:
You've become faster :P
Deadly_king:
--- Quote from: Garfield on October 07, 2010, 06:05:34 pm ---You've become faster :P
--- End quote ---
Hehe......yeah I guess so ;)
Anyway it would be nice if you could confirm the method since I didn't obtain the exact answer ???
Dania:
The answer is D.
Why?
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