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Chapter 8: Q. 8.55 (page 278)

In a gas mixture, the partial pressures are nitrogen $425 T o r r$ , oxygen $115 T o r r$ , and helium $225 T o r r$ . What is the total pressure, in Torr, exerted by the gas mixture?

Short Answer

Expert verified

The total pressure is $765 T o r r$ .

Step by step solution

01

Given Information

We need to find the total pressure.

02

Simplify

In a gas, mixture, each gas exerts its partial pressure, which is the pressure it would exert if it were the gas in the container. Dalton's law that the total pressure of a gas mixture is the sum of the partial pressures of the gases in the mixture.

Total pressure is:

Nitrogen is $P_{n i t} = 425 T o r r$

Oxygen is $P_{o x y} = 115 T o r r$

Helium is $P_{h e l i u m} = 225 T o r r$

localid="1652623807311" role="math" $P_{t o t a l} = p_{n i t} + P_{o x y} + P_{h e l i u m} = 425 + 115 + 225 = 765 T o r r$

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Most popular questions from this chapter

A gas has a volume of $4.00 L$ at $0 掳 C .$ What final temperature, in degrees Celsius, is needed to change the volume of the gas to each of the following, if $P$ and $n$ do not change?

a. localid="1654147244427" $1.50 L$

b . localid="1654147258094" $1200 mL$

c. localid="1654147278616" $10.0 L$

d.localid="1654147293745" $50.0 mL$

In problem $8.71$ , the balloon reached an altitude of $1000 m$ , where the pressure was $658 m m H g$ and the temperature was $- 8 掳 C$ . What was the volume, in liters, of the balloon at these conditions?

Indicate whether the final volume of gas in each of the following is the same, larger, or smaller than the initial volume, if pressure and amount of gas do not change:
a. A volume of $505 m L$ of air on a cold winter day at $15 掳 C$ is breathed into the lungs, where body temperature is $37 掳 C$
b. The heater used to heat the air in a hot-air balloon is turned off.
c. A balloon filled with helium at the amusement park is left in a car on a hot day.

Two flasks of equal volume and at the same temperature contain different gases. One flask contains $5.0 g o f H_{2}$ . Is each of the following statements true or false? Explain. $(8.1)$

a. Both flasks contain the same number of molecules.

b. The pressure in the the flasks are the same.

A balloon is filled with helium gas at a partial pressure of $1.00 a t m$ and neon gas with a partial pressure of $0.50 a t m$ . For each of the following changes (a to e) of the initial balloon, select the diagram (A, B, or C) that shows the final volume of the balloon: $(8.2, 8.3, 8.6)$

a. The balloon is put in a cold storage unit ( $P a n d n$ do not change).

b. The balloon floats to a higher altitude where the pressure is less ( $n a n d T$ do not change).

c. All of the neon gas is removed ( $T a n d P$ do not change).

d. The Kelvin temperature doubles and half of the gas atoms leak out ( $P$ does not change).

e. $2.0 m o l e s o f O_{2}$ gas is added ( $T a n d P$ do not change).

See all solutions

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