FoodMatter & Energy for Life

QUIZ

• 1.

•1 Calorie = ____ calorie(s)

• 2.

•The specific heat capacity of water is_______.

• 3.

•k is the symbol that represents this number.

• 4.

•What is the scientific way to express the number 1,000?

• 5.

•1 calorie = ______ J

• 6.

•The symbol J represents this measurement of heat.

• 7.

•Write one of the two equations we used to determine the amount of Heat Energy in a substance.

• 8.

•Compare the reactions of cellular respiration and combustion, in reference to amount of required energy to complete both.

• 9.

•What problem could there be with measuring the complete energy of a 10 lb. Cheeto in the lab that we performed in class?

• 10.• If a food source contains 3200 J of energy;• It’s mass is 3.4 kg;

• What would the change in temperature of water in the calorimeter have been?

• 11.• How heavy is a piece of caramel

popcorn if it was burned in our lab and found to raise the temperature of water from 32°C to 54°C? • 7.5 kJ was recorded in the data.

• 12.• While constructing this

“Learning Opportunity”, I used up .65 moles of Adenosine Triphosphate.• How many calories did I burn?• Show the matrix work!!!

BONUS• Name an example from each category.

•Monosaccharide→• Disaccharide →• Polysaccharide →• Label which belongs to each.

•ANSWERS

• 1. 1,000• 2. 4.2J / g °C• 3. 1,000• 4. 1x103

• 5. 4.2 J• 6. Joules• 7. q = MC∆T or J = g * S.H. * ∆T

• 8. Cellular Respiration requires less energy to start reacting. More efficient method.• 9. H20 could evaporate.• q/(M*C) = ∆T

3200J/(3400g*4.2J/g°C) = ∆T • = .22°C

• 11. q=MC ∆T…..q/C ∆T = M• 7500J/(4.2J/g°C)*(22°C) = M• = 81.17g• 12. (.65 mol ATP) * (7.3Calories/1mol ATP)

• = 4.75 Calories

BONUS• Monosaccharide →• Disaccharide →• Poly saccharide→