"What is the internal energy of 10 moles of helium at 100 K?"
The same question is asked about 10 moles of oxygen. I'm going to guess PV=nRT which would give 8,314 J as the PV value. Because (at least in chemistry this is true) delta H = delat E +/- work and work = PV, so PV would somehow...
1 bar in Pa is approx is 100,000. The difference is 6370. Therefore the answer is .93 bar. (thanks) Just not sure when you say that rho*g*h gives pressure and not force, the units sum to "N" and not "N/m^2."
The question asks; "Assuming that the density of air is a constant 1.3 kg/m3 and that the air pressure is 1 bar, what is the pressure at the top of a 500 meter high skyscraper?"
I'm having trouble setting something up but here is what I do have;
Regarding liquids we know that F =...
A question is being asked about a combustion chamber that has a moving piston; "an engine."
"Which expression expresses the efficiency of the engine?"
The answer given is:
(Pressure(from burning))(Volume)/(moles)(delta H)
While this looks some thing like PV = nRT, I don't fully understand...
Homework Statement
I don't have a picture of this situation so I will do my best to describe it in words. If we have a box that's "swinging" in a circular motion at the end of a string, but at the same time the box is experiencing a frictional force due to it's brushing against another...