Solving a Conceptual Question on Energy and Work

[shahal]

Homework Statement

I have a rather conceptual question, if I can understand it I can probably solve the prblem.
Here is the problem:

me and my equipment weight is w N. I am climbing a mountain and I climb an elavation of
h meters.

Now, my body convert 25% of energy burnt from fat into PE. The other 75% appears as heat. Half of the heat generated goes into evaporating sweat.

Also given are the following info:

fat contains 1000kcal/kg
and latent heat of evaporation of sweat is 2.5x10^6 j/Kg

Homework Equations

mgh
wh
mL

The Attempt at a Solution

ofcourse total work done to go up h meters = w x h J = wh Joules

what I do not understand is since 25% of fat burnt is converted into PE, does this mean
that this is equal to wh J?

or does it mean that 25% of wh is equal to the energy generated by burning fat?

Thanks in advance.

 

[shahal]

Basically I need to find out the amount of fat burnt.