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Assume that 100.0 mL of 0.200 M CsOH and 50.0 mL of 0.400 M HCl are mixed in a calorimeter. The solutions start out at 22.50 °C, and the final temperature after reaction is 24.28 °C. The densities of the solutions are all 1.00 g/mL, and the specific heat of the mixture is 4.2J(g . °C). What is the enthalpy change for the neutralization reaction of 0.020 mol of CsOH in kJ/mol? Express your answer using two significant figures.