At a birthday party, a student ate a piece of cake (food energy value of 400 calories). To prevent this energy from being stored as fat, she decides to drink ice water at 0 C. She reasons that the ingested ice water will be warmed up to her normal body temperature of 37 C and absorb the energy. How much ice water would she have to drink to absorb the energy generated by metabolizing the birthday cake?

asked by Bob

12 years ago

785 views

0

0

1 answer

400 Cal = 1674.72 J
Q =c•m•ΔT,
m = Q/c•ΔT = 1674.72/4180•37 =0.01 kg

answered by Elena

0

0

Question

At a birthday party, a student ate a piece of cake (food energy value of 400 calories). To prevent this energy from being stored as fat, she decides to drink ice water at 0 C. She reasons that the ingested ice water will be warmed up to her normal body temperature of 37 C and absorb the energy. How much ice water would she have to drink to absorb the energy generated by metabolizing the birthday cake?

1 answer

400 Cal = 1674.72 J
Q =c•m•ΔT,
m = Q/c•ΔT = 1674.72/4180•37 =0.01 kg

Elena · Answer

400 Cal = 1674.72 J Q =c•m•ΔT, m = Q/c•ΔT = 1674.72/4180•37 =0.01 kg