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.
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The diagram below shows the different phase transitions that occur in matter. which arrow represents the transition in which dew is formed?
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If we compare and contrast electromagnetic waves with sound waves, all but one statement is true. that is a) sound waves require a medium to travel while electromagnetic waves do not. b) electromagnetic waves can travel through the vacuum of space while sound waves cannot. c) electromagnetic waves must have a medium in which to travel, but sound waves can travel anywhere. eliminate d) sound waves must bounce off of matter in order to travel while electromagnetic waves do not require matter to be present.
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Let's assume you have infinite amount of dilute aqueous solution of gold that only contains gold at...
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