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Which one is having the highest value of diffusivity? (a)Ammonia

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+1 vote
in Mass Transfer by (37.1k points)
Which one is having the highest value of diffusivity?

(a) Ammonia

(b) Urea

(c) Glucose

(d) Ethanol

The question was asked in a national level competition.

This interesting question is from Diffusivity at 25 Degree Celsius and 1 atm Pressure in chapter Modes and Diffusion of Mass Transfer

1 Answer

0 votes
by (39.8k points)
Correct answer is (b) Urea

Easy explanation: Thermal diffusivity of urea is 8.06 while that of ammonia, glucose and ethanol are 1.76, 0.60 and 1.00 respectively. Its unit is cm    ^2/s.

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