Consider a mixture of 75 g water at room temp. 23. degrees C and 25 g water at 95 degrees C. Calculate the?

Question

equilibrium temp. of the mixture.

I have no idea?! Please help!

Answer 1

Add up the heat lost and gained by each system to determine the final temp.

Q = mc (Tf - Ti)

(75 g)(4.184 j/gC)(Tf - 23 C) = (25 g)(4.184 j/gC)(Tf - 95 C)

Use algebra to solve for Tf.