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Grade: 12
        When to use 8.314 and when to use 0.0821 as Gas constant during NEET exam? Will the value be given to us during questions of thermodynamics and equillibrium? Also how to calculate faster for NEET as log tables are not provided to us?
7 months ago

Answers : (1)

Chhavi Jain
92 Points
							
 
Dear student ,
 
It is very important to remember the values of R with their units. 
eg. if in the questions from the Gaseous State ; Pressure is given in atm , volume in L , temperature in Kelvin the use:
R= 0.0821 atm L mol-1 K-1.
 
If you have to find energy (in Joules ) like you are talking about equillibrium questions then use R= 8.314 J mol-1 K-1
 
If you have to answer in calories then use R= 2 cal mol-1 K-1 
 
Chemistry Consultant
Askiitains
7 months ago
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