A piece of chocolate cake contains about 400 Calories. A nutritional Calorie is equal to 1000 calories (thermo-chemical calories). How many 8-in-high steps must a 180-lb man climb to expend the 400 Cal from the piece of cake? See Exercise 15 for the formula for potential energy.
Answer to relevant QuestionsIn a bomb calorimeter, the bomb is surrounded by water that must be added for each experiment. Since the amount of water is not constant from experiment to experiment, mass must be measured in each case. The heat capacity of ...Consider the following changes: a. N2(g) → N2(l) b. CO(g) + H2O(g) → H2(g) + CO2(g) c. Ca3P2(s) + 6H2O(l) → 3Ca(OH)2(s) + 2PH3(g) d. 2CH3OH(l) + 3O2(g) → 2CO2(g) + 4H2O(l) e. I2(s) → I2(g) At constant temperature ...When water is supercooled, it freezes at a temperature below 0.0oC. If 10.9 kJ of heat is released when 2.00 moles of supercooled water at 215.0oC freezes, calculate the molar enthalpy of fusion for ice at 0.0oC and 1 atm. ...You have a 1.00-mole sample of water at 230oC, and you heat it until you have gaseous water at 140.oC. Calculate q for the entire process. Use the following data: Specific heat capacity of ice = 2.03 JoC-1g-1 Specific heat ...One mole of an ideal gas is contained in a cylinder with a movable piston. The temperature is constant at 77oC. Weights are removed suddenly from the piston to give the following sequence of three pressures: a. P1 = 5.00 atm ...
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