Question

56,57,58,59,60,61,62

56) For the reaction 3H2(g) + N2(g)s-2NH(g), determine the equilibrium constant at 600°C if at this temperature, the equilibrium concentrations are: [N2 453 M; H:-2.49 M and [NHs] 7.62 M 57) When a sample of aqueous hydrochloric acid was neutralized with aqueous sodium hydroxide in a calorimeter, the temperature of 100.0 g of water surrounding the reaction increased from 25.0°C to 31.50. If the specific heat of water is 1.00 calV(g.°C), calculate the quantity of energy in calories involved in this neutralization reaction. 58) How many kJ of heat are needed to raise the temperature of 0.20 kg of water from 20 °C to 100 °C in preparing a cup of coffee? ( cwater-4、18 kJ/kg°C) 59) Consider the reversible reaction: A(g)2Bg At equilibrium, the concentration of A is 0.381 M and that of B is 0.154 M. What is the value of the equilibrium constant, Key? 60) A candy sample of 1.00 g is completely combusted in a bomb calorimeter. The calorimeter contains 982 g of water, and the measured temperature increase is 2.62°C. What is the fuel value of the candy sample in nutritional Calories? [SH-1.00 cal/g.C 61) When 50.0 mL of 0.200 MAgNO, and 50.0 mL of 0.200 M HCI are mixed in a constant-pressure calorimeter, the temperature of the mixture increases from 23.2 °C to 24.8 °C. The temperature increase is caused by the following reaction: AgNO (ag)+HCaq) AgCI(s)+HNO (ag Calculate the enthalpy change (AH) for this reaction in kJ/mol of AgNO. (Assume that the combined solution has a mass of 100.0 g and a specific heat of 4, 18 J/gr.) 2) A 40.0 mL sample of 0.100 M HCl is titrated with 0.100 M NaOH. Calculate the pH after the addition of each of the following volumes of NaOH: (a) 0.0 mL, (b) 10.0 mL, (c) 20.0 mL, (d) 40.0 mL, (e) 60.0 mL. A plot of the pH of the solution as a function of the volume of added titrant is known as a p titration curve. Using the available data points, plot the pH titration curve for the above titration.

Answer 1

57 4-650 a BC9」 key (0.381) mé H) △r = 983(1.oo) (2-62) Caf 5184 Kcol a ule Valu- fude Valie (1.6) 24.8-13-2= △T= At consta«t, pressure qf △H In his seaction m.mo les of Agcl fomec- 5oX 2o 0.01 mole