Acar manufacturer claims that since their car engines dont get very hot, more of the gasolines energy can be used to make the car move. what law is related to this claim?

Arollercoaster car at the top of a hill has potential energy kinetic energy chemical energy light energy

Voltaic cells produce a positive overall charge. what does this indicate? a. the reaction is likely to be endothermic. b. the reaction is spontaneous. c. the reaction is not likely to occur. d. the reaction is not spontaneous.

Kp is the equilibrium constant for dissociation of the propionic acid dimer. what is the sign of the slope for a plot of the natural logarithm of kp vs. inverse temperature for this reaction?