144. A sample of oxygen gas has a volume of 125 L at 25 ' C and a pressure of 0.987 atm. Calcul

step 1 solution for the given data here for the given problem here we have pressure is equal to 0 .987

144. A sample of oxygen gas has a volume of 125 L at 25 ' C...

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Key Concepts

Temperature Conversion

Temperature conversion, particularly from Celsius to Kelvin, is essential in gas law calculations because the absolute temperature scale must be used in formulas derived from kinetic molecular theory. Converting to Kelvin (by adding 273.15 to a Celsius temperature) ensures that the ratios of temperature are maintained accurately in gas law equations.

Standard Temperature and Pressure (STP)

STP refers to a set of conditions commonly used in gas calculations, typically defined as 0°C (273.15 K) for temperature and 1 atm for pressure. This standardization allows for meaningful comparisons of gas volumes and behaviors under reproducible conditions, and it is particularly useful when converting gas volumes to these reference conditions.

Combined Gas Law

The Combined Gas Law relates the pressure, volume, and temperature of a fixed amount of gas through the equation P1V1/T1 = P2V2/T2. This law is derived from Boyle’s Law, Charles’s Law, and Gay-Lussac’s Law, and it enables the calculation of a gas's final state when it undergoes changes in these conditions.

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