Let's assume you have infinite amount of dilute aqueous solution of gold that only contains gold at a concentration of 1x10.10weight raction. if you would like to get the gold by evaporating water (say by heating from 25 °c to 100 °c at 1 atm pressure, how much energy you will need to produce 1 gm of gold. for industrial consumption, average cost of electricity is $0.0665 kw h. from steam table you may find that to evaporate water into steam at 100°c and 1 atm pressure, 2675.4 kj of energy needed per kg of water. what would be the cost per gram of gold from your production facility only on the basis of evaporation (cost of electric energy)? how does it compare with the market price? today's price of gold: $39.14/gm.