Complete these practice problems for Chapters 3 \& 4 using your class notes, textbook, and lab materials, and you may work with other students. I suggest you use a pencil to complete your work. You'll need your scientific calculator (or graphing calculator). SHOW ALL OF YOUR WORK. Use the space provided for your work and circle your answers. Question 1. You are working out for a little over an hour, and you burn 3.66102kJ of energy. For food that day, you ate 2.23103kJ. a. How many nutritional Calories did you burn during your workout? b. Considering how much you ate and how much you burned, how much excess nutritional energy did you consume? c. For the entire day, including your workout, you burned 2.65103Cal of energy. If 1lb of fat is stored by the body for each 14.5103kJ of excess energy, how long will it take you to lose 1lb ? Question 2. A cook wants to heat 1.55kg of water from 23C to 100.0C. If they use natural gas, which produces 49 . kJ of heat per gram, to heat the water on their stove, how much natural gas would they need to burn? Assume that the transfer of heat from the gas burner on the stove to the water is 100% efficient