Question

If the gas in the piston above has a volume of 20.l at a temperature of 25c, what is the volume of that gas when it is heated to 100c if the pressure remains constant?

Answer 1

Using Charles's Law, the volume of the gas when heated from 25°C to 100°C, at constant pressure, is approximately 25.04 L.

Step-by-step explanation:

The subject of this question is Chemistry, specifically relating to the concepts of gas laws in thermodynamics. To determine the volume of a gas when it is heated from 25°C to 100°C while keeping pressure constant, we use Charles's Law. Charles's Law states that the volume of a gas is directly proportional to its temperature in kelvins, provided the pressure is kept constant. The formula is represented as V1/T1 = V2/T2.

First, we convert all temperatures to kelvin: 25°C = 298.15 K and 100°C = 373.15 K. Then we can solve for V2 by rearranging the formula to V2 = V1 * (T2/T1). With an initial volume (V1) of 20 L and initial temperature (T1) being 298.15 K, we find the new volume (V2) at temperature (T2) of 373.15 K.

V2 = 20 L * (373.15 K / 298.15 K) = 20 L * 1.252 = 25.04 L

The volume of the gas when heated to 100°C, assuming constant pressure, is approximately 25.04 L.