$12\mathrm{.}3-1.$ Insulation in a Cold Room. Calculate the heat loss per m$2$ of surface area for a temporary insulating wall of a food cold storage room where the outside temperature is $299\mathrm{.}9$ K and the inside temperature $276\mathrm{.}5$ K$.$ The wall is composed of $25\mathrm{.}4$ mm of corkboard having a k of $0\mathrm{.}0433$ W$/$m $$ K$.$ Ans. $39\mathrm{.}9$ W$/$m$2$