Macmillan Learning Carbohydrates serve as a vital source of chemical energy to the human body. Carbohydrates are broken down into smaller units of glucose, among other sugars, providing energy to various muscles and organs, including the brain. On average, for every 7.00 g of carbohydrates consumed, the body will store 119 kJ of energy. Convert this energy value to kilocalories (kcal). 119 kJ= 4.184 Incorrect FEB 21 tv MacBook Pro NA kcal S

Macmillan Learning Carbohydrates serve as a vital source of chemical energy to the human body. Carbohydrates are broken down into smaller units of glucose, among other sugars, providing energy to various muscles and organs, including the brain. On average, for every 7.00 g of carbohydrates consumed, the body will store 119 kJ of energy. Convert this energy value to kilocalories (kcal). 119 kJ= 4.184 Incorrect FEB 21 tv MacBook Pro NA kcal S

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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19. An ice cube is placed in a sealed insulated container of hot water at 80°C. After five minutes, the ice cube disappears. Ice Cube Hot Water Water 5 min. Which best describes the change that took place inside the container? Heat energy in the ice cube was dissipated into the hot water. Heat energy in the hot water was reduced by kinetic energy in the ice cube. The total heat energy in the container was reduced by the ice cube. O The hot water lost the same amount of heat energy as the ice cube gained.
A hot 105.0 g lump of an unknown substance initially at 152.2 °C is placed in 35.0 mL of water initially at 25.0 °C and the system is allowed to reach thermal equilibrium. The final temperature of the system is 67.9 °C. Using this information and the specific heat values for several metals in the table, identify the unknown substance. Assume no heat is lost to the surroundings. tungsten graphite rhodium aluminum zinc titanium Substance Specific heat (J/(g.°C)) aluminum 0.897 graphite 0.709 rhodium 0.243 titanium 0.523 tungsten 0.132 zinc 0.388 water 4.184
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The combustion of propane (C3H8) produces 2220 kJ of energy per mole of propane consumed. What mass in grams of propane will be required to heat 55.0 gal of bathtub water from 25.0°C to 35.0°C if the process is 80.0% efficient? (1 gal = 3.785 L, 1 cal = 4.184 J, the density of water is 1.00 g/mL, the specific heat of water is 1.00 cal/(g°C)
Kilocalories to heat 5.0 kg of water from 22 °c to 28 °c. Kilojoules to heat 224 g of gold from 18 °c to 185 °c.
1 Cal= 4.18 kJ
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15.0 mL of a strong base is added to 15.0 mL of a strong acid in a coffee cup calorimeter. The temperature of the calorimeter contents rises from 22.5 °C to 24.5 °C. Assume that: concentration of base = 0.500 M concentration of acid = 0.500 M the specific heat of the solution is 4.184 J/g°C the density of the solution is 1.00 g/mL the coffee cup does not absorb or release energy itself Calculate the ΔH for this neutralization reaction in kJ per mole of base. Answer Options: A. –0.299 kJ/mol B. –33.5 kJ/mol C. –16.7 kJ/mol D. –0.502 kJ/mol
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