Chemistry Regents Practice Test 2026 – Complete Prep Resource

The ideal gas law, represented by the equation PV = nRT, captures the relationship between pressure (P), volume (V), temperature (T), and the number of moles (n) of a gas, with R being the ideal gas constant. According to this relationship, when temperature remains constant, pressure and volume exhibit an inverse relationship: as the volume of a gas decreases, its pressure increases, and vice versa. This is a manifestation of Boyle’s Law, which states that for a fixed amount of gas at a constant temperature, the product of pressure and volume remains constant.

Additionally, when temperature changes, it can influence both pressure and volume depending on the nature of the system and the constant factors held. For instance, if volume is held constant and temperature increases, the pressure will indeed rise. Therefore, understanding that pressure and volume are inversely related when temperature is consistent is accurate and aligns with established gas laws.

Other options misrepresent how these variables interact. For example, stating that pressure increases only with decreasing volume ignores situations where temperature may vary. Similarly, the relationship that higher temperature decreases gas pressure contradicts basic gas behavior since increased temperature typically leads to increased pressure if volume stays constant. Lastly, claiming gases behave the same regardless of