I am glad we finally agree venus is hot because of pressure and not CO2 cutting that silly argument out of the CO2->warming thesis posed by those who don't believe in natural variation of climate.
I knew that finally you'd come around.
What... I didn't say that, you misunderstood my examples ... I said pressure counteracts gravity without changing the internal heat of the gas ...
The only heating/cooling occurs from radiation loss of the gas, and a supply of external heat (=the sun).
I didn't mention CO2, that's not relevant for this example. I just wanted to show that pressure and energy are two different things.
Hot = energy
Pressure = force.
See... those are entirely different physical concepts.
Gosh this is hard to explain and I thought I finally had a good example and I failed at explaining it...
Do you understand the difference between energy and force?
I don't know how to explain it ... perhaps like this:
I have a stone. I put a stone on top of it. The stone at the bottom experiences 3 forces: 1 from the top stone, 1 from gravity, and 1 from the ground which prevents it from falling to the center of the earth.
These forces counteract each other, there is 0 net force. The stone is in equilibrium, it doesn't move, it doesn't do anything. It doesn't heat up. It doesn't gain any energy.
The thing is: if there is zero net force on an object, then the energy of the object does not change.
At most you'll get some deformation in the stone, if the crystal lattice cannot counteract the stresses that are applied to it. But that's just another physical process ... and in that case the energy of the stone will change, slightly, because its shape is changed.
An atmosphere is like the stone, except that it has no shape. Instead of a shape, it has a certain density and volume, for the rest it's really similar. An atmosphere can also counteract a force (the gravity force) without changing its energy.
Oh... maybe a small balloon is a good example. You can blow up a rubber balloon. Inside the balloon the pressure is higher than outside, because the rubber presses against it. The air inside the balloon will lose its heat to the surroundings and is in equilibrium with the rubber shell. It won't heat up, it won't change its energy, because there is no net force acting on it.
pressure does not cause surface temperature but is a result of atmospheric composition and surface temperature
Temperature has nothing to do with pressure ... the pressure is a result of gravity acting on the mass of column of air - pressure cancels that force out.
Temperature will affect the density of an atmosphere, but whatever the temperature, the column of air will have an equal mass and thus an equal force (well almost ... if the atmosphere expands, more mass will be in an region of lower gravity pull, but I don't think that's a big effect, let's just ignore that).
(Unless you want to discuss a dynamic atmosphere where heat makes air expand, pressure drops etcetera, but those are variations with respect to an average pressure which is determined the gravity)