1. A protein bar has a nutritional value of 255 Calories. Calculate how many joules this is.
2. You go to a restaurant and order a cheeseburger and on the menu it says it has 1525 kcal of energy. Convert this to joules of energy.
3. A 15.6 g sample of ethanol absorbs 868 J as it is heated. If the initial temperature of ethanol is 21.5˚C, what is the final temperature?