Final answer:
Charles's Law states that the volume of a gas is directly proportional to its temperature in Kelvin, when pressure is held constant, expressed as V = kT or V1/T1 = V2/T2. The correct answer to the equation that describes Charles's Law is D. all of the above.
Step-by-step explanation:
Charles's Law states that the volume of a given amount of gas is directly proportional to the temperature in the Kelvin scale at constant pressure. Mathematically, it can be expressed in several ways, including V = kT where 'V' is volume, 'T' is temperature in Kelvin, and 'k' is a constant. Another way to express Charles's Law is by the equation V1/T1 = V2/T2, where V1 and T1 are initial volume and temperature, and V2 and T2 are the final volume and temperature, respectively. Therefore, the correct answer is D. all of the above.
All temperatures in Charles's Law equations must be in Kelvin, which can be converted from Celsius by the formula K = °C + 273.