In an isolated system, two copper bars at different temperatures transfer energy until both are at the same temperature. how would the transfer of energy be different if the bars were in an open system?
a. energy transfer would occur only between the copper bars.

b. energy transfer would occur between the copper bars and the surroundings.

c. no energy transfer would occur between the copper bars or the surroundings.

d. energy transfer would occur only with the surroundin

You are attempting to recrystallize a crude product mixture. you add the appropriate amount of hot solvent and are allowing the solution to slowly cool to room temperature. however, at room temperature no crystals have appeared, which of the following methods should be used to induce crystallization? choose all correct answers. a) place the flask in an ice bath. b) swirl the contents of the flask. c) add a small seed crystal of the desired product. d) scratch the inside of the glassware using a stir rod. it can be multiple choices