- #1
Rubidium
- 17
- 0
force exerted on walls of metal box...please help!
1. Homework Statement
A cubic metal box that has 20-cm-long edges contains air at a pressure of 1.0 atm and a temperature of 300 K. The box is sealed so that the enclosed volume remains constant, and it is heated to a temperature of 400 K. Find the force due to the internal air pressure on each wall of the box.
2. Homework Equations
PV=nRT
3. The Attempt at a Solution
F=[tex]\left|[/tex][tex]\Delta[/tex][tex]\vec{p}[/tex]/[tex]\Deltat[/tex][tex]\right|[/tex]
v=[tex]\sqrt{3RT/M}[/tex]=[tex]\sqrt{3(8.314 J/molxK)(300K)/0.029kg/mol)}[/tex]=507.957 m/s
Delta[/tex][tex]\vec{p}[/tex]/[tex]=mv^2=(9423.9987g)(507.957m/s)=4.787x10^6
I just need delta t
1. Homework Statement
A cubic metal box that has 20-cm-long edges contains air at a pressure of 1.0 atm and a temperature of 300 K. The box is sealed so that the enclosed volume remains constant, and it is heated to a temperature of 400 K. Find the force due to the internal air pressure on each wall of the box.
2. Homework Equations
PV=nRT
3. The Attempt at a Solution
F=[tex]\left|[/tex][tex]\Delta[/tex][tex]\vec{p}[/tex]/[tex]\Deltat[/tex][tex]\right|[/tex]
v=[tex]\sqrt{3RT/M}[/tex]=[tex]\sqrt{3(8.314 J/molxK)(300K)/0.029kg/mol)}[/tex]=507.957 m/s
Delta[/tex][tex]\vec{p}[/tex]/[tex]=mv^2=(9423.9987g)(507.957m/s)=4.787x10^6
I just need delta t