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  3. part a) calculate Δhrxn for the reaction cao(s

Part A) Calculate ΔHrxn for the reaction CaO(s)+CO2(g)→CaCO3(s) given these reactions and their ΔH values: Ca(s)+CO2(g)2Ca(s)++12O2(g)O2(g)→→CaCO3(s),2CaO(s),ΔH=−814.1 kJΔH=−1269.8 kJ...

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Chemistry

Part A) Calculate ΔHrxn for the reaction CaO(s)+CO2(g)→CaCO3(s)given these reactions and their ΔH values:Ca(s)+CO2(g)2Ca(s)++12O2(g)O2(g)→→CaCO3(s),2CaO(s),ΔH=−814.1kJΔH=−1269.8 kJ Express the enthalpy in kilojoules to one decimalplace.

Part B)

Calculate Δ Hrxn for the following reaction:

CH4(g)+4Cl2(g)→CCl4(g)+4HCl(g)

given these reactions and their ΔH values:

C(s)C(s)H2(g)+++2H2(g)2Cl2(g)Cl2(g)→→→CH4(g),CCl4(g),2HCl(g),ΔH=−74.6kJΔH=−95.7 kJΔH=−184.6 kJ

Express the enthalpy in kilojoules to one decimal place.

Part c)

The thermite reaction, in which powdered aluminum reacts withcopper oxide, is highly exothermic.

2Al(s)+3CuO(s)→Al2O3(s)+3Cu(s)

Use standard enthalpies of formation to find ΔH∘rxn forthe thermite reaction.

Express your answer using one decimal place and include theappropriate units

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