William burns 5.1 g of peanuts beneath 1000 g of water, which increases in temperature from 28◦C to 47◦C. Assuming 50% efficiency, what is the food value of the peanut? Answer i…

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asked May 25, 2020 115k views

1 Answer

Eking · Answer 1 · 2020-05-31T05:50:24+0000

Answer:

food value of the peanut is 38 000 cal

Step-by-step explanation:

Heat observed by water

$Q = m* C * \Delta T$

C is a constant.

For water, C = 1 c gm/ °C

So here Q = (1000) (1 ) (47-28)

Q = 19 000 cal

FOR 50% efficiency,

Total heat released by peanut is:

19,000 cal / 0.50 = 38 000 cal

So the food value of the peanut is 38 000 cal.