Question

3. When 15.7 g of calcium chloride (CaClz) was dissolved in 200.0 ml of water in a coffee-cup calorimeter, the temperature of the solution increased from 25.00 °C to 34.13 °C, the dissolution of CaCl in water in units of kJ per mole of CaCl,. Calculate the entha lpy change(AH otn)for You can assume that the calorimeter loses only a negligible quantity of heat, that the total solution is 200.0 mL (adding the solid CaCl, did not change the volume significantly). thah solution is 1.00 g/mL, and that the specific heat of the solution is 4.18 1/g C volume of the density of the the (HINT: Use the example provided in Chapter 19-Lecture 2-slides #445 as a guide.) a sol t.ir7 x 200.0g x C 34.13E 25.00め:1 25 ー +.IT7 Arenn 4. You are given the following data: ΔΗ=-2602.2 2C2H2 (g) + 502 (g) → 4CO2 (g) + 2H20 (I) C (s) +02 (g) CO2 (g) 2 H2 (8)O2 (8) 2 H2o () ΔΗ--57 1.66 kJ Use Hess's Law and the above information to calculate the ΔΗ for the following reaction H2 (g) → C2H2 (g) 2C (s) + ->For full credit, show how you arrived at your answer

Answer 1