#حل_مسئله
#آنتروپی

🔏 A mug of tea has been left to cool from 90⁰C to 18⁰C. If there is 0.2Kg of tea in the mug, and the tea specific heat capacity 4200 J/(K.Kg), show that the entropy of the tea has decreased by 185.7 J/K. Comment on the sign of this result.

🛠Necessary tools:

🔹first law of thermodynamics
🔹definition of entropy

⚠️The above process is an isochoric process.

☕️Calculate how much you add to the entropy of the universe by the amount of tea you drink per day.😉

📚Concepts in Thermal Physics
👥Stephen J. Blundell and Katherine M. Blundell

☕️physics cafe