Athlete Climbs w/ 4 Potato Chips - Amount Heated 44

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Homework Statement


A)If an athlete (whose mass is 60.0kg) has an energy conversion effiency of 24% and she has an average power of 325W when climbing stairs how high would she be able to climb with the energy consumed from eating 4 potatop chips(28g of chips has 610 kJ of energy and 28g of chips is approximately 15 chips.
B)If the bag of chips in the above questions had been burned and used to heat water from 13degrees celsius to 20 degress celsius, then how much water was being heated(assuming 100%energy conversion)

Homework Equations


Eout/Ein*100%


The Attempt at a Solution



m=60.0kg
Efficiecny=24%
P=325 W
 
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Discussion

A)Ein= 610 kJ= 6.1*10^6 JEout= Ein*efficiencyEout=6.1*10^6 J *0.24 Eout=1.45*10^6 J Energy consumed from 4 potato chips= 1.45*10^6 JPower=E/tt=E/Pt=1.45*10^6 J /325 Wt=4476.9 secB)Heat energy transferred=mass*Cp*deltaTMass of water=28gCp=4.186J/g*KdeltaT= 20-13=7KHeat energy transferred=28g*4.186J/g*K*7KHeat energy transferred=1130.5 J