4. When 50 cm of 1.0 mol dm- nitric acid solution, HNO3 (aq), is added to 50 cm of 1.0 mol dm-3 potassium hydroxide solu

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4 When 50 Cm Of 1 0 Mol Dm Nitric Acid Solution Hno3 Aq Is Added To 50 Cm Of 1 0 Mol Dm 3 Potassium Hydroxide Solu 1 (109.83 KiB) Viewed 28 times

4. When 50 cm of 1.0 mol dm- nitric acid solution, HNO3 (aq), is added to 50 cm of 1.0 mol dm-3 potassium hydroxide solution, KOH(aq), the temperature of the mixture increases by 6.4 °C. What will be the temperature change when 25 cm of each of these solutions are mixed together? a. 1.6 °C b. 3.2 °C C. 6.4 °C d. 12.8 °C 5. The AHⓇ values for the formation of two oxides of nitrogen are given below. 12 N2 (g) + O2(g) → NO2 (g) N2 (g) + 2 O2(g) → N2O4 (g) AH° = -57 kJ mol AH° = + 9 kJ mol' Use these values to calculate AH° for the following reaction (in kJ): 2 NO2 (g) → N2O4 (g) a. - 105 b. - 48 C. + 66 d. + 123