Thanks! Question 6 (1 mark) Consider the reaction between aqueous sodium hydroxi

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Question 6 (1 mark) Consider the reaction between aqueous sodium hydroxide and silver cation: 2 NaOH (aq) + 2 Ag+ (aq) Ag20 (s) + H2O (l) + 2 Na+ (aq) a) Given the data in the table below, calculate the standard enthalpy change (in kJ) for the reaction. Compound Ag+ (aq) Ag20 (s) H20 (0) Na+ (aq) NaOH (aq) AH° (kJ/mol) 105.9 - 31.05 - 285.83 - 240.1 - 469.6 b) when the reaction was performed in a constant pressure calorimeter, it was observed that the temperature of the solution rose from 25.0 °C to 33.3 °C. If there was 100.0g of solution in the calorimeter, calculate the mass of sodium hydroxide used in this experiment. You may need to obtain some data from your textbook when answering this question. . Assume the specific heat capacity of the solution is the same as the specific heat capacity of water. CHEM 100 Problem Set 7- Fall 2017 - A2 Page 2

Explanation / Answer

The standard enthalpy of the reaction is 354.12 KJ/mole.

Calculated by the standard enthalpy of products minus the reactents.

The standard enthalpy of reaction  is the enthalpy change that occurs in a system when matter is transformed by a given chemical reaction, when all reactants and products are in their standard states.

DelH = m* s * delT m = mass, s= specific heat , delT is the change in temperature.

354.12 * 10^3= m gm * 4.184 J/degreesC.gm * 8.3 degrees celcius (Taking the specific heat capacity of the H20)

m = 354120 / 34.72 = 10199.30 gm .

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