the gas condenses to become liquid in the solid container
Placing iodine covered in a warm place could cause sublimation to a cool spot on the container - if the temperature is even on the container walls, if the temperature is warm enough the violet colour of gaseous iodine may be visible.
When gas is put into a container, it expands to fill the available space evenly. The pressure of the gas molecules against the walls of the container increases until it reaches equilibrium. The volume, temperature, and pressure of the gas will determine its behavior in the container.
Gas pressure decreases when cooling down a closed container.
it is a solid
Iodine sublimes (i.e., goes from a solid to a gas) at room temperature and atmospheric pressure. However, it will exist as a solid for a very long time if it is kept in a closed container. As the iodine solid sublimes, the pressure will increase slightly within the closed container which will cause the iodine gas to reach an equillibrium state with the solid iodine (i.e., there will not be an increase in the amount of iodine gas in the container).
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.
The pressure of the gas would also decrease.
Placing iodine covered in a warm place could cause sublimation to a cool spot on the container - if the temperature is even on the container walls, if the temperature is warm enough the violet colour of gaseous iodine may be visible.
A liquid or gas become a solid.
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.
According to Charles' Law: Volume of a gas increases as temperature inceases. But if the gas is contained in a rigid container then the volumme cannot increase, but the pressure will.
If the volume stays the same, the pressure will decrease.
Silver would be a solid at room temperature. This is also what happens with gold. If both were heated, then they would be liquids.
When gas is put into a container, it expands to fill the available space evenly. The pressure of the gas molecules against the walls of the container increases until it reaches equilibrium. The volume, temperature, and pressure of the gas will determine its behavior in the container.
Gas pressure decreases when cooling down a closed container.
The gas expand to fill the volume of the container.
In a perfectly flexible and expandable container (pressure is constant) the volume of an ideal gas will double as the absolute temperature doubles. For a non-ideal gas and non-perfect container, your results will vary but will always be somewhat less than double.