The reaction for reduction of zine from roasted zinc ore is:

ZnO$+C=Zn+CO.$

Required: $1.$ The heat of this reaction as it takes place in the zine retort, beginning and ending at $1000C.$

$2.$ The heat required for the reaction, per kilogram of zine vapor produced, allowing for the fact that the zinc oxide and carbon are put into the retort cold $($assume $.).$