Question

A glass laboratory flask is filled with gas at 27∘C and 0.97atm pressure, sealed, and then heated to 139∘C. What is the pressure inside the flask?

Answer 1

Answer on Question #49076 – Chemistry – Inorganic Chemistry

Question:

A glass laboratory flask is filled with gas at 27°C and 0.97 atm pressure, sealed, and then heated to 139°C. What is the pressure inside the flask?

Answer:

Gay-Lussac's law states that the pressure of a gas varies directly with the Kelvin temperature, assuming that volume is constant (in our case the volume of flask is constant). We use the following formula:

$$\frac {P _ {1}}{T _ {1}} = \frac {P _ {2}}{T _ {2}}$$ $$\frac {0 . 9 7 \mathrm {a t m}}{2 7 + 2 7 3} = \frac {P _ {2}}{1 3 9 + 2 7 3}$$

Then $P_{2} = 1.33\mathrm{atm}$

Answer: 1.33 atm.

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