a) DU = Q - L =
= (- 0.110 * 2.26*10^6 - 2.43*10^5) J =
= - 491600 J ~ - 492 KJ
b) 492000/4186 kcal = 117.44 kcal
N° 12
Lavoro L : 2,43*10^2 kJ
Sudorazione S : 2,26*0,11*10^3 kJ
ΔU = (L+S)/K = 10^3(0,243+2,26*0,11) kJ / 4,186 kJ/kcal = 117,44 kcal