Thermochemistry help!?!?
I've had 3 midterms (brain is fried), and I don't want to make the drive all over campus tomorrow. I figured there's someone on here that kinda knows what they're talking about.
It's a simple heat of combustion problem. High-purity benzoic acid (C6H5COOH; Delta Hcomb = -3327 kJ/mol) is a combustion standard for calibrating bomb calorimeters. A 1.221-g sample burns in a calorimeter (head capacity = 1365J/degree c) that contains exactly 1.200kg of water. What temperature change is observed (in either C or K)? Now, obviously the specific heat capacity of water is 4.184J/g*k I guess I'm just stuck on how to set up the equation, that is all. I'm off to read about John Snow's mapping of Cholera... oh joy!!! Colin |
Re: Thermochemistry help!?!?
All i can say is good luck buddy.
|
Re: Thermochemistry help!?!?
that not that hard, same stuff i did in grade 12 chem, i forget it all now. but it wasnt that hard.
|
Re: Thermochemistry help!?!?
Originally Posted by kamilk69
that not that hard, same stuff i did in grade 12 chem, i forget it all now. but it wasnt that hard.
|
Re: Thermochemistry help!?!?
Wish I could help ya buddy, but I haven't taken college chem in 4 years. And I'm still in college for 2 more years! :S
|
Re: Thermochemistry help!?!?
God I'm a moron.
Simple as hell. -q sample = q calorimeter heat capacity X delta t (benzoic acid) + heat capacity X delta T (water) = (3227kj/mol X (1.221g benzoic acid / 122.118g/mol)) = 5.053E0 = delta T God damn that feels good :6 |
Re: Thermochemistry help!?!?
Originally Posted by Snafubmx234
I've had 3 midterms (brain is fried), and I don't want to make the drive all over campus tomorrow. I figured there's someone on here that kinda knows what they're talking about.
It's a simple heat of combustion problem. High-purity benzoic acid (C6H5COOH; Delta Hcomb = -3327 kJ/mol) is a combustion standard for calibrating bomb calorimeters. A 1.221-g sample burns in a calorimeter (head capacity = 1365J/degree c) that contains exactly 1.200kg of water. What temperature change is observed (in either C or K)? Now, obviously the specific heat capacity of water is 4.184J/g*k I guess I'm just stuck on how to set up the equation, that is all. I'm off to read about John Snow's mapping of Cholera... oh joy!!! Colin Your missing the amount of grams per mol of benzoic acid. That would help. |
Re: Thermochemistry help!?!?
Originally Posted by MADMAX
Your missing the amount of grams per mol of benzoic acid. That would help. |
Re: Thermochemistry help!?!?
The sad thing here is that your problem doesn't require any chemistry or physics at all. It's simple algebra. Study up on math son :1. You're lacking in that dept if can't set up equations simply by looking at the units involved. I mentioned that because it was a piece of info that was lacking. Whether you get it by looking at the peridoc table (pointless) or by just looking up the chemical itself is your problem. |
Re: Thermochemistry help!?!?
Originally Posted by MADMAX
The sad thing here is that your problem doesn't require any chemistry or physics at all. It's simple algebra. Study up on math son :1. You're lacking in that dept if can't set up equations simply by looking at the units involved. I mentioned that because it was a piece of info that was lacking. Whether you get it by looking at the peridoc table (pointless) or by just looking up the chemical itself is your problem. |
Re: Thermochemistry help!?!?
He didnt know the answer so he decided to flame instead. I did poor in high school chemistry lol. I guess it helps when you actually do your work and pay attention :6
|
Re: Thermochemistry help!?!?
I only said that because his dumbass tried to talk ---- after feeling superior in solving his problem ("look at me I can do 7th grade algebra"), which I'm sure was his gay little plan when posting it in the first place. ------ childish.
Originally Posted by Snafubmx234
It's called a periodic table, look at it ::)
^^^ This BS was uncalled for. Keep bobbing for dickapples little boy. One day you will grow up. |
Re: Thermochemistry help!?!?
Originally Posted by Snafubmx234
It's called a periodic table, look at it ::)
Don't forget the thermodynamic effect from inserting your fist in your ass |
Re: Thermochemistry help!?!?
Originally Posted by MADMAX
I only said that because his dumbass tried to talk ---- after feeling superior in solving his problem ("look at me I can do 7th grade algebra"), which I'm sure was his gay little plan when posting it in the first place. ------ childish.
^^^ This BS was uncalled for. Keep bobbing for dickapples little boy. One day you will grow up. It's called reading comprehension, something you obviously lack. I had already posted the grams/mole of benzoic acid. In what way did I feel all "superior"? I guess the internet is serious ------- business for you.
Originally Posted by Whitey
Don't forget the thermodynamic effect from inserting your fist in your ass |
All times are GMT -5. The time now is 11:38 PM. |
© 2024 MH Sub I, LLC dba Internet Brands