A 1.0 g sample of food reacts with oxygen in a calorimeter containing 500 g of water. The temperature rises 10°C. What is the energy content of the food?

A. 50 Calories/g
B. 20.92 Calories/g
C. 5 Calories/g
D. 18.25 Calories/g

Question

A 1.0 g sample of food reacts with oxygen in a calorimeter containing 500 g of water. The temperature rises 10°C. What is the energy content of the food? 
    
A. 50 Calories/g
B. 20.92 Calories/g
C. 5 Calories/g
D. 18.25 Calories/g

anonymous · Answer

@aaronq

aaronq · Answer

this is a typical calorimeter question

$\sf q=m_{water}*C_p*\Delta T=500 ~g*1~cal/g*(10~C^o)=5000~cal$

1000 cal = 1 Cal thus 5000 cal = 5 Cal

you used 1 gram of material, so 5 Cal/g