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17 Nov 2019
Please solve the first and the third questions A Snickers bar contains 12 g fat, 33 g carbohydrates, and 4.0 g protein Assuming that the food value of fat, carbohydrates, and protein are 9 0 Cal/g, 4.0 Cal/g. and 4.0 Cal/g, calculate the percentage of the energy that comes from fat. (1 Cal = 4.184 kJ) 3.5% 7.5% 12% 24% 42% A system releases 300 J of heat and has 650 J of work done on its by the surroundings What is the change in the internal energy of the system? +950 +350 -350 +750 -250 Calculate the work done when a gas. at P = 1.0 atm, has a volume change from 22.0 L to V_final = 2.0 L (given 1 L atm = 101.3 J) 2.0 kJ -20 kJ +20 kJ +2.0 kJ -25 kJ A cup of coffee is heated in a microwave oven. It absorbs 40 kJ of energy from the microwave, and the volume slightly increases. Which one of the following statements correctly describes the relationship between the change in enthalpy delta H and the change in internal energy delta E of the coffee? delta H = 40 kJ, delta E 40 kJ delta H 40 kJ, delta E = 40 kJ delta H = 40 kJ, delta E = 40 kJ The heat of vaporization of water at 100 degree C is 40.66 k/mol. Calculate the quantity of heat that is absorbed/released when 5.00 g of steam condenses to liquid water at 100 degree C. 11.3 kJ of heat are absorbed. 11.3 kJ of heat released. 147 kJ of heat absorbed. 147 kJ of heat are released.
Please solve the first and the third questions
A Snickers bar contains 12 g fat, 33 g carbohydrates, and 4.0 g protein Assuming that the food value of fat, carbohydrates, and protein are 9 0 Cal/g, 4.0 Cal/g. and 4.0 Cal/g, calculate the percentage of the energy that comes from fat. (1 Cal = 4.184 kJ) 3.5% 7.5% 12% 24% 42% A system releases 300 J of heat and has 650 J of work done on its by the surroundings What is the change in the internal energy of the system? +950 +350 -350 +750 -250 Calculate the work done when a gas. at P = 1.0 atm, has a volume change from 22.0 L to V_final = 2.0 L (given 1 L atm = 101.3 J) 2.0 kJ -20 kJ +20 kJ +2.0 kJ -25 kJ A cup of coffee is heated in a microwave oven. It absorbs 40 kJ of energy from the microwave, and the volume slightly increases. Which one of the following statements correctly describes the relationship between the change in enthalpy delta H and the change in internal energy delta E of the coffee? delta H = 40 kJ, delta E 40 kJ delta H 40 kJ, delta E = 40 kJ delta H = 40 kJ, delta E = 40 kJ The heat of vaporization of water at 100 degree C is 40.66 k/mol. Calculate the quantity of heat that is absorbed/released when 5.00 g of steam condenses to liquid water at 100 degree C. 11.3 kJ of heat are absorbed. 11.3 kJ of heat released. 147 kJ of heat absorbed. 147 kJ of heat are released.
Elin HesselLv2
16 Mar 2019