CHM LIADL Heat Ejrects and Latorimetry Post-Lab Sheet: Heat Effects and Calorime

Question

CHM LIADL Heat Ejrects and Latorimetry Post-Lab Sheet: Heat Effects and Calorimetry Name: UKandria Telvas Show caleulations for credit. Be mindful of significant figures. of aluminum with a mass of 32.5 g is heated to 67.4*C and put into a Styrofoam calorimeter 1. A piece containing 582 g of water that is initially at 21.2?. Assuming no heat is lost, what is the final temperature? The specific heat of aluminum is 0.902 J/g C; for water 4.18 J/g'C. (6 pt.) SEASsT metak : ?.dossige Gasp MC 2. When 50.0 mL of 0.100M HCI is combined with 50.0 mL of 0.100M compound "AB" in a calorimeter, the temperature changes from 22.1'C to 28.7 C. Styrofoam The reaction is HClo" ABuo ? ACIs) + HBuo Assume the density of the solution is 1.000g/mL. and the specific heat capacity C-4.18 JgC. Calclate the A and also the l1 kJ/mole pt) eto to waveungh

Explanation / Answer

Ans 1 :

The heat lost by metal will be gained by water.

Let the final temperature be T

heat = m . c . delta T

32.5 x 0.902 x (67.4 - T) = 58.2 x 4.18 x (T - 21.2)

67.4 - T = 8.29 (T - 21.2)

67.4 - T = 8.29 T - 175.9

67.4 + 175.9 = 8.29 T + T

9.29 T = 243.3

T = 26.19 oC

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