Iwill mark brainliest 1. energy changes occur as a. heat transfer b. work c. power d. a combination of heat transfer and work 2. how does heat energy spontaneously move? * a. heat does not move unless work is done b. heat moves from an object of lower temperature to an object of higher temperature c. heat moves from an object of higher temperature to an object of lower temperature d. heat moves in the direction of the gravitational force

)benzene and toluene form nearly ideal solutions. consider an equimolar solution of benzene and toluene. at 20 °c the vapour pressures of pure benzene and toluene are 9.9 kpa and 2.9 kpa, respectively. the solution is boiled by reducing the external pressure below the vapour pressure. calculate (i) the pressure when boiling begins, (ii) the composition of each component in the vapour, and (iii) the vapour pressure when only a few drops of liquid remain. assume that the rate of vaporization is low enough for the temperature to remain constant at 20 °c.