Question

question 4 of 10 > points earned: 0.00/1.00 why is it necessary to use the gay - lussac law (( \frac{p_1}{t_1}=\frac{p_2}{t_2} )) to calculate the pressure of the air at higher temperatures? select one: because the amount of air in the flask changes as it is heated. this calculation corrects for any air that leaks out of the stopper. this law is used to calculate the vapor pressure directly. because the pressure of a fixed amount of gas in a sealed container increases as its temperature increases.

Explanation:

Step1: Recall Gay - Lussac's Law

Gay - Lussac's Law ($\frac{P_1}{T_1}=\frac{P_2}{T_2}$) is applicable for a fixed amount of gas in a sealed container where the volume is constant. It shows the direct relationship between pressure and temperature.

Step2: Analyze the conditions

The law assumes a fixed amount of gas in a sealed container. If there is a leak (air leaks out of the stopper), the amount of gas is not constant, and if we want to calculate vapor pressure directly, other factors and laws related to vapor - liquid equilibrium may be more appropriate. Gay - Lussac's Law is for a situation with a fixed amount of gas in a sealed container.

Answer:

Because the pressure of a fixed amount of gas in a sealed container increases as its temperature increases.