A mass m of water at temperature T1 K is isobarically and adiabatically mixed with an equal mass of water at T2 K. The entropy change of the inverse isa)b)c)d)None of theseCorrect answer is option 'B'. Can you explain this answer?

Question

Answer

A point to note is that, since the process is adiabatic there is no change of the surroundings. We know that for isobaric (constant pressure process), the change in entropy is given by

Now,

and

Also, the higher temperature loses heat and the water at the lower temperature gains heat, we can write

⇒

Since,

and

Total entropy of entropy change of universe

Similar Physics Doubts

1000gm of water at temperature 300K is isobarically and adiabatically mixed with an equal mass of water at 500K. C = 0.01 cal K-1gm-1 . The entropy change of the universe in (cal K-1 ) is Correct answer is '0.645'. Can you explain this answer?

1kg of ice melts at 0ºC into water at the same temperature. The change in entropy is (in cal/K) ____. Correct answer is '293'. Can you explain this answer?

If a capacitor of 1μF charged to a potential of 300 V is discharged through a resistor kept at room temperature, then the entropy change of the universe is equal to __________ x 10-5 J/K. Correct answer is '1.5'. Can you explain this answer?

Top Courses for Physics

Suggested Free Tests

Related Content

Schools

Competitive Examinations

Quick Access Links

Technical Exams