Answer to Question #268739 in Molecular Physics | Thermodynamics for Kevin

Question

John decides to lose weight by eating only cold food. A 200 grams mango

pudding yields about 375 kcal of energy when eaten. If its specific heat is 0.5

kcal / kg. ℃, how much greater is its energy content at 60 ℃ than 30 ℃ ?

Answer 1

$Q=cm\Delta{T}=0.5\frac{kcal}{kg\cdot\degree{C}}\times0.2kg\times(60\degree{C}-30\degree{C})=3\ kcal$

Answer: greater by 3 kcal