The state of matter at 200 °C and 30 atm depends on the specific substance but is typically either liquid or solid due to high pressure. Gas is less likely unless the substance has a high critical temperature and pressure.
The state of matter for a substance at 200 °C and 30 atm depends on the specific substance in question. For many substances, these conditions exceed both the normal boiling and freezing points.
However, at 30 atm, most substances are likely to be in a liquid or solid state due to the high pressure, which forces particles closer together, leading to a state with a definite volume. Without knowing the particular substance, it's not possible to state definitively whether it would be solid or liquid, but gas is less likely unless the substance is one with an extremely high critical temperature and pressure.