Question

6. A 250g glass of water at 4 ̊C is added to 750g of water initially at 20 ̊C. (cwater=1 cal/g K)

a) Assuming no heat is lost to the environment write an expression for the heat into the smaller amount of water as it warms up to equilibrium (no numbers yet).

b) Assuming no heat is lost to the environment write an expression for the heat out of the 750g amount of water as it cools down to equilibrium (still no numbers).

c) Solve for the final equilibrium temperature of the water ( at the end of this part you can put in the numbers).

Answer 1

A 250g glass of water at 4c = Gain heat . 7rog watest at 20°c = lost heat A 250g of water gam heat and increase Temp. a then eauilibrium with 750g of wates at temp. T so expressity .i mcote heat ganca) il Q = mCCT-4) - 25081 CT-4) B) Frog of water decrease in temo. & cauilibrium at Temp. I. s g = heat lost = mcat 2750x1620-1) c) Heat Gean = Heat lust :: 2380 (9-4)= 758620-1) , T^4 = 3620-1) 1-4 = 3620-5) 1.:41264 T216 lequilinium tempolec CS Scanned voith T-4260-31 CamScanner