Pure Substance

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MaryBanh_2K
Posts: 101
Joined: Wed Sep 18, 2019 12:21 am

Pure Substance

Postby MaryBanh_2K » Fri Jan 10, 2020 5:40 pm

Why is the activity of pure substances equal to zero?
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Fiona Latifi 1A
Posts: 102
Joined: Sat Sep 14, 2019 12:16 am

Re: Pure Substance

Postby Fiona Latifi 1A » Fri Jan 10, 2020 5:58 pm

According to the textbook, "activities are used to take into account deviations from ideal behavior". Since solids and liquids are considered to be completely pure substances, they do not deviate from ideal behavior. Therefore, their activity is equal to 1, not zero.
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Fatemah Yacoub 1F
Posts: 114
Joined: Thu Jul 11, 2019 12:16 am

Re: Pure Substance

Postby Fatemah Yacoub 1F » Fri Jan 10, 2020 7:50 pm

The activity of pure substances are actually not equal to zero they are equal to one.
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McKenna_4A
Posts: 115
Joined: Sat Aug 24, 2019 12:18 am

Re: Pure Substance

Postby McKenna_4A » Sat Jan 11, 2020 6:45 am

Activity is equal to 1 in order to not change any values
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ayushibanerjee06
Posts: 177
Joined: Thu Jul 11, 2019 12:16 am
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Re: Pure Substance

Postby ayushibanerjee06 » Sat Jan 11, 2020 1:38 pm

Their activities are actually 1, not 0.
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Donavin Collins 1F
Posts: 66
Joined: Sat Sep 14, 2019 12:16 am

Re: Pure Substance

Postby Donavin Collins 1F » Sat Jan 11, 2020 3:58 pm

It's actually equal to one, not zero. Therefore, in the equation they have no effect.
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