QUESTION 3 150 cm³ of a 0,500 mol dm-3 HCI and 150 cm³ of 0,500 mol dm³ NaOH were mixed. The temperature raise by 4,0°C. When 150 cm³ of 0,500 mol dm³ weak acid HA and 150 cm³ of the same NaOH solution were mixed, the temperature rose by 3,0°C. Assume that the heat capacity of the reaction vessel is negligible, and that the density of all the solutions is 1,00 gcm-³. The heat capacity of water C = 75,4 J Kl mol-¹. a) Calculate the heat of neutralization of with HCI NaOH. b) Calculate the heat of reaction of the weak acid HA with NaOH. c) Calculate the heat of dissociation of HA.

QUESTION 3 150 cm³ of a 0,500 mol dm-3 HCI and 150 cm³ of 0,500 mol dm³ NaOH were mixed. The temperature raise by 4,0°C. When 150 cm³ of 0,500 mol dm³ weak acid HA and 150 cm³ of the same NaOH solution were mixed, the temperature rose by 3,0°C. Assume that the heat capacity of the reaction vessel is negligible, and that the density of all the solutions is 1,00 gcm-³. The heat capacity of water C = 75,4 J Kl mol-¹. a) Calculate the heat of neutralization of with HCI NaOH. b) Calculate the heat of reaction of the weak acid HA with NaOH. c) Calculate the heat of dissociation of HA.

Chemistry by OpenStax (2015-05-04)

1st Edition

ISBN:9781938168390

Author:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser

Publisher:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser

Chapter5: Thermochemistry

Section: Chapter Questions

Problem 52E: Before the introduction of chlorofluorocarbons, sulfur dioxide (enthalpy of vaporization, 6.00...

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