A student mixes 100 g of liquid A at a temperature of 80 C

Last updated: 5/13/2023

A student mixes 100 g of liquid A at a temperature of 80 C with 100 g of liquid B at a temperature of 20 C After the mixture comes to thermal equilibrium it has a temperature of 40 C The student contends If I mix 100 g of liquid A at a temperature of 60 C with 100 g of liquid B at a temperature of 30 C I will also end up with a 200 g mixture at a temperature of 40 C What if anything is wrong with the student s contention If something is wrong identify it and explain how to correct it If nothing is wrong explain the physics behind the student s answer QUO