They can change into coal
When temperature and pressure change, minerals in rocks can undergo recrystallization or phase transitions, leading to changes in their crystal structure and composition. This process can result in the formation of new minerals or the growth of existing ones to accommodate the new environmental conditions. Conversely, if the changes are too extreme, minerals may become unstable and break down into new phases or even melt.
If a sedimentary rock is exposed to heat and pressure, it may undergo metamorphism and transform into a metamorphic rock. The minerals present in the sedimentary rock can recrystallize and reorganize due to the increased temperature and pressure, resulting in the formation of new minerals and a change in texture.
Boyles law "happens" when the temperature is held constant and the volume and pressure change.
Something has to happen to cause the change in form (pressure, temperature, etc).
When the chemical composition of a rock changes, it undergoes a process called metamorphism. This can happen due to high pressure, temperature, or the presence of chemically active fluids, causing minerals in the rock to recrystallize into new forms. The original rock's minerals may be altered or new minerals may form, resulting in a different appearance and texture.
Minerals precipitate when there is an increase in mineral concentration in a solution, leading to the formation of solid mineral particles. This can happen due to changes in temperature, pressure, or pH levels, causing the minerals to become insoluble and form solid deposits.
At low temperature and high pressure, the VOLUME of the gas will be reduced.
Pressure drops when the temperature drops.
It will boil
The temperature remain constant.
The pressure or volume of a quantity must increase.
Metamorphic rocks are created from rocks that are deformed by tectonic forces and/or are brought to temperature that are much different from those that they were first formed in (usually hotter). The effect of increased temperature is the growth of minerals from others that are no longer stable under the changed pressure and temperature conditions (e.g. diamond is formed from graphite under very high pressure and garnet growths at high temperatures and pressures from aluminium rich usually sedimentary rocks). The effect of shear stress on the rock (i.e. directed force creating not only compression but also deformation) is the change of shape of minerals as well as rotation and alignment of platy minerals into bands. These processes lead to the usually banded appearance of metamorphic rocks.