## pressure

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nshahwan 1L
Posts: 100
Joined: Fri Aug 30, 2019 12:18 am

### pressure

what is the difference between partial pressure and total pressure? Could someone explain this using an example

Connor Ho 1B
Posts: 102
Joined: Sat Aug 17, 2019 12:17 am

### Re: pressure

total pressure = sum of partial pressures

for example, in a system with h2 and o2, where the partial pressure of h2 is 1.2 atm and o2 is 3.2 atm, the total pressure would be 1.2 + 3.2 = 4.4 atm
Last edited by Connor Ho 1B on Tue Jan 21, 2020 4:03 pm, edited 1 time in total.

Victoria Zheng--2F
Posts: 103
Joined: Fri Aug 09, 2019 12:17 am

### Re: pressure

partial pressures are the pressures of each individual gas in a mixture of gases, and the total pressure is the sum of all the partial pressures of each individual gases in the mixture.

Nathan Nakaguchi 1G
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### Re: pressure

Partial pressure just means that it is a part/contributing to the total pressure of the system. Total pressure is all of the components of a reaction that would cause pressure combined (added), while partial pressure is just the pressure created by one aspect or compound.

Miriam Villarreal 1J
Posts: 105
Joined: Sat Aug 17, 2019 12:16 am

### Re: pressure

For a gas phase reaction, we express equilibrium constant by pressures, and when there is 1 gas it is the total pressure whereas 2 more gases are referred to as partial gas of each gas implying that the sum of them will make up the total pressure.

Asha Agarwal 1E
Posts: 51
Joined: Fri Aug 30, 2019 12:16 am

### Re: pressure

The total pressure is the pressure of the entire system, whereas each gas making up the system has its own partial pressure, which makes up the total pressure. If you had a container with O2 and H2 gas is it and the partial pressure of each gas was 0.5 atm, the total pressure would be 1 atm.

Deja Nora
Posts: 11
Joined: Fri Sep 28, 2018 12:22 am

### Re: pressure

The partial pressure is the pressure of an individual gas in a mixture while the total pressure is the sum of the partial pressures.

nshahwan 1L
Posts: 100
Joined: Fri Aug 30, 2019 12:18 am

### Re: pressure

thank you all so much this helped a lot!

Cavalli_1H
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### Re: pressure

Partial pressures denotes the pressures of each gas in a larger mixture of gases the total pressure represents the sum of partial pressures.

KHowe_1D
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### Re: pressure

partial pressure is the pressure of each individual gas and total pressure is the pressure of the entire system.

Orrin Zhong 4G
Posts: 51
Joined: Sat Jul 20, 2019 12:16 am

### Re: pressure

Partial pressure is the pressure of an individual type of gas molecule within a gas mixture. The total pressure is the combined pressure of all the gases making up the gas mixture. Therefore, the total pressure is equal to the sum of all of the partial pressures for each type of gas in the gas mixture. Partial pressure is proportional to its mole fraction. An example: If there are 4 moles of O2 and 6 moles of N2 and the total pressure is 10 atm, then what is the partial pressure of O2? Since O2 has a mole fraction of 4 atm / 10 atm = 0.4, it has a partial pressure of 0.4(10 atm) = 4 atm.