How much energy is 1gram of carbohydrate?

14.63 KJ/g, i know some textbooks like to round up, b/c in mines the answer is 15, remember when you have the difference between the energy required to break the bonds and energy released from the product, you should get -2636KJ and then divide it by the molar mass of glucose which is 180.18mol/l and you'll get the answer stated above, hope it helps.