Well if not im commenting on this for points. Today in Class we had a problem set to complete. If you didn't finish it you have to finish it for homework and it was hw#12.
Also remember that you can use the combined formula (P1V1/T1=P2V2/T2) and whichever number isn't given is assumed to be constant. Example: If you are given the pressure and volume, then it is just P1V1=P2V2 or if it gives the pressure and temperature it is P1/T1=P2/T2
Lab is tommorow, remember that all conversions must be of equal units in pressure. and that when using temprature you have to change "C" to "K", which is done by adding 273.15 to whatever degree "C" you have.
Hey guys, make sure you memorize the ideal gas constant, or at least make sure that you have in your lab notebook.(Dr. B wants us to use the one out of the book, so double check what you have against that, because there are about 20 different constants in different terms. Some are in kPa, mm Hg, lb/ft., and so on)
Well if not im commenting on this for points. Today in Class we had a problem set to complete. If you didn't finish it you have to finish it for homework and it was hw#12.
ReplyDeletewell, i need points also so lets go with this.
ReplyDeleteFor the problem set you might want to remember that:
P1V1 = P2V2
V1/T1 = V2/T2
I don't remember actually having to use any other equations then that, but remember to convert degrees in Celsius to Kelvin
Remember for the lab tomorrow that all calculations invloving temperature need to be done in Kelvin.
ReplyDeleteAlso remember that you can use the combined formula (P1V1/T1=P2V2/T2) and whichever number isn't given is assumed to be constant. Example: If you are given the pressure and volume, then it is just P1V1=P2V2 or if it gives the pressure and temperature it is P1/T1=P2/T2
ReplyDeleteHere are two cool websites. Ones on the history of Celsius and the others on Kelvin's history
ReplyDeletehttp://www.astro.uu.se/history/celsius_scale.html
http://www.enchantedlearning.com/chemistry/glossary/Kelvin.shtml
Lab is tommorow, remember that all conversions must be of equal units in pressure. and that when using temprature you have to change "C" to "K", which is done by adding 273.15 to whatever degree "C" you have.
ReplyDeletePV = nRT, where P is pressure, V is volume, n is the amount in moles, T is temperature, and R is the constant that we will be determining in the lab.
ReplyDeleteIdeal gas constant lab prep
ReplyDeletehttp://74.125.93.132/search?q=cache:_RtdOyif6TYJ:www.crsciences.com/documents/Chemistry_Lab__Gases__Ideal_Gas_Constant_Write_Up.doc+calculating+the+ideal+gas+constant+lab&cd=1&hl=en&ct=clnk&gl=us&client=safari
talks about gas constant in engineering
ReplyDeletehttp://www.engineeringtoolbox.com/individual-universal-gas-constant-d_588.html
http://www.molecularsoft.com/help/Gas_Laws-Gay_Lussac.htm
ReplyDeleteHeres a good site reviewing Gay Lussac's Law.
Don't forget that Dr. B will be collecting our Binders soon for a grade.
ReplyDeleteremember P1V1/T1 = P2V2/T2
ReplyDeletehelped with the homework
Hey guys, make sure you memorize the ideal gas constant, or at least make sure that you have in your lab notebook.(Dr. B wants us to use the one out of the book, so double check what you have against that, because there are about 20 different constants in different terms. Some are in kPa, mm Hg, lb/ft., and so on)
ReplyDeletehere's a good website with practice problems and answers for the gas laws:
ReplyDeletewww.misterguch.brinkster.net/PRA009.pdf
Binder check on Monday, if I recall correctly.
ReplyDeleteFor PV=nRT, pressure is in atm, volume is in L, temperature is in Kelvin (as has already been noted several times) and number of moles is... a number.
Here is a site on the gas constant:
ReplyDeletehttp://www.engineeringtoolbox.com/individual-universal-gas-constant-d_588.html
Binder checks are starting on Friday.
ReplyDeletehere's a site for pressure, volume, and temperature:
ReplyDeletehttp://easycalculation.com/chemistry/combined-gas-law.php
also remember that torrs and mm Hg are equivalent units. Also know how to convert all pressure units to atms.
ReplyDelete