bar conversion

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

bar conversion

Postby nshahwan 1L » Tue Jan 21, 2020 6:24 pm

Could someone more clearly explain how to change the units to bar? Example 5I.1 show it but it is not very clear and I am confused

Isha_Maniyar_Dis2E
Posts: 110
Joined: Thu Jul 11, 2019 12:16 am

Re: bar conversion

Postby Isha_Maniyar_Dis2E » Wed Jan 22, 2020 1:36 am

The conversion of bar to atm will be given in the formula handout we are given in each test. It is mainly a difference in values of R. If you are given values in bar, use the value for R involving bar, and then convert to atm using the formula sheet.

Justin Sarquiz 2F
Posts: 106
Joined: Fri Aug 30, 2019 12:15 am

Re: bar conversion

Postby Justin Sarquiz 2F » Wed Jan 22, 2020 8:21 am

The formula sheet should say how to convert from atm to bar or bar to torr, so you should not worry too much about that.

Julie Park 1G
Posts: 100
Joined: Thu Jul 25, 2019 12:15 am

Re: bar conversion

Postby Julie Park 1G » Wed Jan 22, 2020 9:18 am

In example 5I.1, they want you convert the partial pressures PH2 and PCl2 from mPa (which is given) to bar.

Partial pressure of H2 = 4.2 mPa and Cl2 = 8.3 mPa
It's also given that 1 bar = 10^5 Pa
However, we are given partial pressures in mPa. Knowing that there are 1000 mPa in 1 Pa, you can convert 4.2 mPa and 8.3 mPa to 4.2x10^-3 Pa and 8.3x10^-3 Pa.

Now that you know the Pa, you can convert the units to bar.

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

Re: bar conversion

Postby nshahwan 1L » Sun Jan 26, 2020 2:46 pm

I noticed this on the formula sheet thank you for letting me know!

Manav Govil 1B
Posts: 104
Joined: Sat Sep 07, 2019 12:19 am

Re: bar conversion

Postby Manav Govil 1B » Sun Jan 26, 2020 6:46 pm

Also, if you are given the concentration and need to convert into bar, torr, etc., you would use the PV = nRT equation with the corresponding R.


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