Question

A sample of hydrogen (H2) gas at 122 ∘C and has a pressure of 1.10 atmAt what final temperature, in degrees Celsius, will the pressure of the H2 decrease to 0.26 atm, if volume and amount of gas do not change?Express your answer using three significant figures.

Answer 1

Explanantion:

We are given: initial temperature of H2 = 122 degrees Celsius

: initial pressure of H2 = 1.10 atm

: final pressure of 0.26 atm

Using Gay-Lussac's Law:

$\begin{gathered} \frac{P_1}{T_1}\text{ = }\frac{P_2}{T_2} \\ \\ \therefore T_2\text{ = }\frac{P_2T_1}{P_1}\text{ = }\frac{0.26\times122}{1.10}\text{ = 28.9 }\degree C \end{gathered}$

Answer:

At 28.9 degrees Celsius