A student wishes to measure the enthalpy change of the reaction of magnesium oxide solid (MgO, M= 40.30 g/mol) with hydrochloric acid (HCl, M= 36.46 g/mol), by the reaction represented in the equation below. MgO(s) + 2 HCI(ag) → MgCl,(aq) + H,0(t) (a) The student designs an experiment to dissolve 1.00g of MgO(s) in an insulated cup containing 100.g of HCI(aq) with a slight molar excess of the acid. What minimum concentration of HCI in moles per liter is needed for the experiment? Assume the density of the solution is 1.00g/mL (b) The student carries out the experiment and measures a temperature rise of 8.27°C (i) Assuming the specific heat capacity of the solution is 4.00 J/g°C, calculate the amount of heat absorbed by the solution from this reaction. (ii) Calculate the experimental enthalpy change for this reaction in KJ/moln Include the sign
A student wishes to measure the enthalpy change of the reaction of magnesium oxide solid (MgO, M= 40.30 g/mol) with hydrochloric acid (HCl, M= 36.46 g/mol), by the reaction represented in the equation below. MgO(s) + 2 HCI(ag) → MgCl,(aq) + H,0(t) (a) The student designs an experiment to dissolve 1.00g of MgO(s) in an insulated cup containing 100.g of HCI(aq) with a slight molar excess of the acid. What minimum concentration of HCI in moles per liter is needed for the experiment? Assume the density of the solution is 1.00g/mL (b) The student carries out the experiment and measures a temperature rise of 8.27°C (i) Assuming the specific heat capacity of the solution is 4.00 J/g°C, calculate the amount of heat absorbed by the solution from this reaction. (ii) Calculate the experimental enthalpy change for this reaction in KJ/moln Include the sign
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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
Transcribed Image Text:A student wishes to measure the enthalpy change of the reaction of magnesium oxide solid (MgO,
M= 40.30 g/mol) with hydrochloric acid (HCI, M = 36.46 g/mol), by the reaction represented in the
equation below.
MgO(s) +2 HCI(aq) → MgCl,(aq) + H,0(t)
(a) The student designs an experiment to dissolve 1.00g of MgO(s) in an insulated cup containing
100.g of HCI(aq) with a slight molar excess of the acid. What minimum concentration of HCI in
moles per liter is needed for the experiment? Assume the density of the solution is 1.00g/mL
(b) The student carries out the experiment and measures a temperature rise of 8.27°C
(i) Assuming the specific heat capacity of the solution is 4.00 J/g°C, calculate the amount of heat
absorbed by the solution from this reaction.
(ii) Calculate the experimental enthalpy change for this reaction in KJ/moln Include the sign
'rxn
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