- #1
LT72884
- 335
- 49
Ok, i am struggling to figure something out. I don't know why math is so much easier than physics haha.
ok, here is my struggle. I have two states, state 1 and 2, which i will call just 1 and 2.
1:
T=298kelvin
V=0.025m(cubed)
P=310Kpa
Mass1=Mass2
R=0.2870
2:
T=323kelvin
V=0.025m(cubed)
P=??
Mass2 = Mass1
R=0.2870
This is how i solved for P2 and it was WRONG!
P2V2=mR2T2 where m is mass
mass=V(rho) = 0.025(1.22) = 0.0305kg of air in the closed system
P2= mRT divided by volume. I get 113kpa. Book says 336kpa.
IF I USE P1V1/T1=P2V2/T2, i get the right answer. BUT it should have worked the way i did solving for mass because mass IS volume multiplied by density and it doesn't change..
Thanks
ok, here is my struggle. I have two states, state 1 and 2, which i will call just 1 and 2.
1:
T=298kelvin
V=0.025m(cubed)
P=310Kpa
Mass1=Mass2
R=0.2870
2:
T=323kelvin
V=0.025m(cubed)
P=??
Mass2 = Mass1
R=0.2870
This is how i solved for P2 and it was WRONG!
P2V2=mR2T2 where m is mass
mass=V(rho) = 0.025(1.22) = 0.0305kg of air in the closed system
P2= mRT divided by volume. I get 113kpa. Book says 336kpa.
IF I USE P1V1/T1=P2V2/T2, i get the right answer. BUT it should have worked the way i did solving for mass because mass IS volume multiplied by density and it doesn't change..
Thanks