Go Back   Physics Help Forum > High School and Pre-University Physics Help > Thermodynamics and Fluid Mechanics

Thermodynamics and Fluid Mechanics Thermodynamics and Fluid Mechanics Physics Help Forum

Reply
 
LinkBack Thread Tools Display Modes
Old Feb 5th 2019, 06:37 PM   #1
Junior Member
 
Join Date: Feb 2019
Posts: 3
Please Help

1.An ideal gas is contained in a tank at 120 atm of pressure and 263K.
(b) Suppose instead that the temperature first rises by 50K and then half the mass of the gas is drawn off. What is the new pressure?
2.In an experiment, a vacuum of 10-10 atm is achieved in a bottle. If the bottle is at room temperature (30C), what is the number of molecules in the bottle per cubic centimeter?
3.Find the entropy change for
(a) 12 g of ice cooling from -8oC -10oC;
(Heat capacity of ice is 37.6 J/(molC). Latent heat of fusion of ice is 6.0 kJ/mol. Heat capacity of water is 4.18 kJ/(kgC). Latent heat of vaporization of water is 2.26 MJ/kg.)
DazaiReta is offline   Reply With Quote
Old Feb 5th 2019, 06:45 PM   #2
Forum Admin
 
topsquark's Avatar
 
Join Date: Apr 2008
Location: On the dance floor, baby!
Posts: 2,664
What have you been able to do so far? We can help you better that way.

-Dan
__________________
Do not meddle in the affairs of dragons for you are crunchy and taste good with ketchup.

See the forum rules here.
topsquark is offline   Reply With Quote
Old Feb 6th 2019, 04:29 AM   #3
Senior Member
 
Join Date: Aug 2010
Posts: 404
Ideal gas law: PV= NRT where P is the pressure, V is the volume, T is the temperature in K, N is the number of molecules, an R is a constant.

Last edited by HallsofIvy; Feb 6th 2019 at 02:41 PM.
HallsofIvy is offline   Reply With Quote
Reply

  Physics Help Forum > High School and Pre-University Physics Help > Thermodynamics and Fluid Mechanics



Thread Tools
Display Modes



Facebook Twitter Google+ RSS Feed