Solve Chemistry Homework: Mass of SO2 in 20L Cylinder @ 40°C, 200kPa

Click For Summary

Discussion Overview

The discussion revolves around a chemistry homework problem involving the calculation of the mass of sulfur dioxide (SO2) in a 20-liter cylinder at a specified temperature and pressure. The focus is on applying the ideal gas law and understanding molar mass to derive the solution.

Discussion Character

  • Homework-related

Main Points Raised

  • One participant presents the problem and outlines the known variables: volume, temperature, pressure, and molar mass of SO2.
  • Another participant suggests calculating the mass directly from the number of moles already determined using the ideal gas law.
  • A participant expresses confusion about the appropriate equation to use for calculating mass, citing a lack of a specific value.
  • Another participant encourages a return to basic chemistry principles, specifically asking about the molar mass of SO2.
  • One participant confirms the molar mass of SO2 as 62 g/mol.
  • A subsequent participant prompts the calculation of the mass based on the previously calculated number of moles.
  • Another participant provides a mass calculation of 97.92 grams for the 1.53 moles of SO2.
  • A final participant acknowledges the simplicity of the problem after receiving guidance.

Areas of Agreement / Disagreement

Participants generally agree on the approach to solving the problem, with some expressing confusion initially but ultimately arriving at a solution without significant disagreement.

Contextual Notes

Some participants initially struggled with the application of the ideal gas law and the relationship between moles and mass, indicating a potential gap in understanding foundational concepts.

Who May Find This Useful

Students studying chemistry, particularly those learning about the ideal gas law and molar mass calculations.

kro041193
Messages
10
Reaction score
0
Hi! ... How can I anwer this question? please is for tomorrow!

calculate the mass of SO2 contained in a 20-L cylinder exposed to the sun at 40°C if the pressure exerted by the gas is 200 kPa.

Homework Equations


the things I have are:
S= 32 O=16(2) SO2= 62
V= 20-L
T= 40°C = 313 K
P= 200 kPa
R= 8.31

then i made this equation:

n=PV/RT snd i got n= 1.53 mols

then I think I have to make this equation:

M=mRT/PV but i don't know the value of "m" :S

could someone help me?
 
Physics news on Phys.org
You know number of moles - now just calculate mass.
 
but with what equation? because the equation that i think i could use .. i can't use it because I am missing a value ... if the equation is M=mRT/PV I am missing the "m" value so i can't do this equation
 
You are overthinking. You have already used ideal gas properties, now go back to the very first chemistry lessons.

What is molar mass of SO2?
 
the molar mass of SO2 is 62
 
So what is mass of 1.53 moles of SO2?
 
97.92
 
Wasn't that hard.

--
methods
 
i know! i was so stuck in something really easy! thnx!
 

Similar threads

Molar Mass of Gas: Calculate at 100°C & 26.6 kPa
  • · Replies 9 ·
Replies
9
Views
2K
Atmospheric Stoichiochemistry: what mass of CO2 is produced?
  • · Replies 1 ·
Replies
1
Views
5K
Find the mass of iron used in the experiment.
  • · Replies 4 ·
Replies
4
Views
3K
Thermodynamics -- piston-cylinder device with helium is compressed....
  • · Replies 1 ·
Replies
1
Views
3K
Questions on Ideal Gas Homework: Solving for Pressure
  • · Replies 7 ·
Replies
7
Views
7K
Moving Boundary (Piston/Cylinder) -- Work Done
  • · Replies 12 ·
Replies
12
Views
4K
Chemistry review questions-calculations
  • · Replies 4 ·
Replies
4
Views
11K
A piston-cylinder device contains 0.05 m3 of water at 200kPa and 25ºC
  • · Replies 1 ·
Replies
1
Views
2K
Calculating Oxygen Mass in a Portable Cylinder | Physics Homework Help
  • · Replies 2 ·
Replies
2
Views
4K
Net Power In a Charged Rotating Cylinder
  • · Replies 9 ·
Replies
9
Views
4K