Help with Thermochem UA problem
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Help with Thermochem UA problem
Could anyone explain this problem to me? The answer is -62.5 kJ, but I got -63.73 kJ. I'm not sure what I did wrong. For delta H =- 61.25 kJ and delta w = 2.48kJ.
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Re: Help with Thermochem UA problem
Hi!
Would you mind showing your work for how you got work? I think your ∆n might be off (∆n should be 0.5, but it seems like you might have plugged in 1?).
Would you mind showing your work for how you got work? I think your ∆n might be off (∆n should be 0.5, but it seems like you might have plugged in 1?).
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- Posts: 104
- Joined: Wed Sep 30, 2020 9:54 pm
Re: Help with Thermochem UA problem
Brittney Nguyen 2L wrote:Hi!
Would you mind showing your work for how you got work? I think your ∆n might be off (∆n should be 0.5, but it seems like you might have plugged in 1?).
Yeah, I plugged in 1 for n because it is 1 mol of CO2. Why would n be 0.5?
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Re: Help with Thermochem UA problem
Kaley Qin 1F wrote:Brittney Nguyen 2L wrote:Hi!
Would you mind showing your work for how you got work? I think your ∆n might be off (∆n should be 0.5, but it seems like you might have plugged in 1?).
Yeah, I plugged in 1 for n because it is 1 mol of CO2. Why would n be 0.5?
Delta n would be .5 because you’re looking for the change in moles of gas for the reaction. However, since your equation should only have 1 mole of CO2, you’ll have to divide all your coefficients by 4 before you determine this change in moles. (This will get you 1 + .25 - .5 - .25 = .5) Hope this helps!
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Re: Help with Thermochem UA problem
Alexandra Ahlschlager 1L wrote:Kaley Qin 1F wrote:Brittney Nguyen 2L wrote:Hi!
Would you mind showing your work for how you got work? I think your ∆n might be off (∆n should be 0.5, but it seems like you might have plugged in 1?).
Yeah, I plugged in 1 for n because it is 1 mol of CO2. Why would n be 0.5?
Delta n would be .5 because you’re looking for the change in moles of gas for the reaction. However, since your equation should only have 1 mole of CO2, you’ll have to divide all your coefficients by 4 before you determine this change in moles. (This will get you 1 + .25 - .5 - .25 = .5) Hope this helps!
oh right! I forgot delta n was the change in moles of gas for the reaction. thank you!
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