because the other half is not empty it is filled with gas
remains constant
The pressure would increase.
There are a number of possible results from the increase in temperature and pressure of a gas held at a constant volume. In some cases, the container will fail and there will be an explosion (this is what happens with bombs, for example). But the container may be strong enough that it does not fail. In that case, under conditions of high temperature and pressure, you might see increased chemical activity in the gas in question, perhaps new compounds would be formed, but that would depend upon the gas in question, as well as the specific temperature and pressure that you reach. At sufficiently high temperature and pressure you can also get nuclear reactions. The higher the temperature and pressure become, the wider the range of possible results.
The particles get closer together and their temperature increases.
Assuming you haven't put any more gas in the container, the pressure will go down. Usually, the reason the volume of the container gets larger is that you put more gas in the container and the gas pressure in the container seeks to equalize with the pressure outside it.
the gas condenses to become liquid in the solid container
Answer The pressure increases when the temperature rises.
If the volume stays the same, the pressure will decrease.
The pressure of the gas would also decrease.
Assuming the volume is kept constant, the pressure will also decrease in this case.
Rising from the sea level to the higher levels will result in decrease of temperature and pressure.
it decreases.
The pressure will increase. The reason is that the more air particles relative the volume the more of a pressure you are going to have, the same thing is true of temperature changes.
Cooling a pressurized container will cause the internal pressure to decrease.This works in reverse too. Depressurizing a pressurized container will lower the internal temperature (and by conduction, the temperature of the container itself). This is why ice often forms around propane gas cylinders after extended use.
If you increase the temperature of a gas, its particles (atoms or molecules) will speed up. If it is in a closed container, the pressure will also increase.
it dies
it decreases
Its vapor pressure equals atmospheric pressure.