Chemistry, 28.02.2020 20:53 tammydbrooks43
Standard heats of formation for reactants and products in the reaction below are provided. 2 HA(aq) + MX2(aq) → MA2(aq) + 2 HX(l) Substance ΔHf° (kJ/mol) HA(aq) -357.05 HX(l) -449.579 MA2(aq) -63.958 MX2(aq) 69.602 What is the standard enthalpy of reaction, in kJ? Report your answer to three digits after the decimal.
Answers: 3
![\Delta H^o_{rxn}=\sum [n\times \Delta H^o_f(product)]-\sum [n\times \Delta H^o_f(reactant)]](/tpl/images/0528/4508/45485.png)
![\Delta H^o_{rxn}=[(n_{(MA_2)}\times \Delta H^o_f_{(MA_2)})+(n_{(HX)}\times \Delta H^o_f_{(HX)})]-[(n_{(HA)}\times \Delta H^o_f_{(HA)})+(n_{(MX_2)}\times \Delta H^o_f_{(MX_2)})]](/tpl/images/0528/4508/6d322.png)
![\Delta H^o_{rxn}=[(1\times -63.958)+(2\times -449.579)]-[(2\times -357.05)+(1\times 69.602)]=-318.618kJ](/tpl/images/0528/4508/7eefc.png)
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Standard heats of formation for reactants and products in the reaction below are provided. 2 HA(aq)...
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