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Form 4 Energy Changes in Chemical and Physical Processes Questions and Answers

Use the information below to answer the question that follows.
Calculate the enthalpy change for the reaction CaO(s)+ $CO_2$ (g) $to$ $CaCO_3$ (s)
$Ca(s)+1/2O_2(g) toCaO(s) DeltaH=-635kJmol^-1$
$C(s) +O_2(s) to CO_2(s) DeltaH=-394kJmol^-1$
$Ca(s)+C(s)+3/2O_2(g) to CaCO_3(s) DeltaH=-1207kJmol^-1$

(6m 48s)

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