Question

1.sample of a gas is in a sealed container. The pressure of the gas is 345 torr , and the temperature is 43 ∘ C . If the temperature changes to 93 ∘ C with no change in volume or amount of gas, what is the new pressure, P 2 , of the gas inside the container?

Using the same sample of gas (P1 = 345 torr , T1 = 43 ∘C ), we wish to change the pressure to 3450 torr with no accompanying change in volume or amount of gas. What temperature T2 , in Celsius, is needed to reach this pressure?

2. Bacteria and viruses are inactivated by temperatures above 135 ∘C in an autoclave. An autoclave contains steam at 1.00 atm and 100 ∘C .

At what pressure, in atmospheres, will the temperature of the steam in the autoclave reach 135 ∘C , if n and V do not change?

Answer 1

1.

P1 = 345 torr ,    P2 = ?

T1 = 43 c = 316 k T2 = 93 C = 366 K

FROM idealgas equation

   P1/T1 = P2/T2

(345/316) = (P2/366)

P2 = new pressure of the gas inside the container= 399.6 torr

P1 = 345 torr ,    P2 = 3450

T1 = 43 c = 316 k T2 = ?

FROM idealgas equation

   P1/T1 = P2/T2

(345/316) = (3450/T2)

T2 = final temperature = 3160 k

                = 2887 c

2.

FROM idealgas equation

   P1/T1 = P2/T2

P1 = 1 atm , T1 = 100 c = 373 K

P2 = ?        T2 = 135 C = 408 K

(1/373) = (P2/408)

pressure required(P2) = 1.094 atm