Use the standard enthalpies of formation table below, determine the change in en

Question

Use the standard enthalpies of formation table below, determine the change in enthalpy for each of these reactions. NH3(g)+HCI(g) Rightarrow NH4CI(s) 2CO(g)+O2(g) Rightarrow 2CO2(g) CH4(g)+2O2(g) Rightarrow CO2(g)+2H2O(I) 2H2S(g)+3O2(g) Rightarrow 2H2O(I)+2SO2(g) 2NO(g)+O2(g)rightarrow 2 NO2(g) Using the standard enthalpies of formation table and the reaction below, determine the standard enthalpy of formation for carbon tetrachloride gas CH4(g)+4CI2(g) rightarrow CCI4(g)+4HCI(g) DeltaH= -397 KJ

Explanation / Answer

Change in enthalpy = enthalpy in product- enthalpy of the reactant

(a) change in enthalpy = enthalpy of NH4Cl- enthalpy of (NH3 + HCl)

                                = -315 - (-92.3-46.2)

                                = 176.5

(b) change in enthalpy = 2* enthalpy of CO2- enthalpy of (CO*2 + O2)

(c) change in enthalpy = (enthalpy of CO2 + 2*enthalpy of H2O) - enthalpy of (CH4 + 2*H2O)

(d) change in enthalpy = enthalpy of (SO2 *2   + H2O *2) - enthalpy of (H2S*2 + O2 *3)

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change in enthalpy = enthalpy of (CCl4 + HCl *4) - enthalpy of (CH4 + Cl2 * 4)

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