12. An exothermic reaction has
(A)has a negative ΔH and absorbs heat from the surroundings. An exothermic reaction feels warm to the touch .
(B)has a positive ΔH and absorbs heat from the surroundings. An exothermic reaction feels warm to the touch .
(C)has a positive ΔH and gives off heat to the surroundings. An exothermic reaction feels warm to the touch.
(D)has a negative ΔH and gives off heat to the surroundings. An exothermic reaction feels warm to the touch.
阿摩線上測驗
登入