Since water has a higher specific heat than iron, consider equal masses of water and iron that are initially in thermal equilibrium. the same amount of heat, 30 calories, is added to each mass. which is true? a) they remain in thermal equilibrium. b) they are no longer in thermal equilibrium; the iron is warmer. c) they are no longer in thermal equilibrium; the water is warmer. d) it is impossible to say without knowing the exact mass involved. e) it is impossible to say without knowing the exact specific heats.