L3 slide 9: Consequence of the second law (ENGR5003)

L3 slide 9: Consequence of the second lawFrom lectureCurrent specThird1 marks2 min

ENGR5003 Lecture 3, slide 9 (2nd law of thermodynamics)

Which statement is a correct consequence of the Second Law of Thermodynamics?

Formulas you may need

Carnot limit: $\eta_{max} = 1 - \dfrac{T_0}{T}$ , so $w_{max} = q\left(1 - \dfrac{T_0}{T}\right) < q$ (on the formula sheet)

AHeat can spontaneously flow from a cold body to a hot body.BAll heat supplied to a heat engine can be converted into work.CNo cyclic heat engine can convert all the heat supplied to it into work.DThe total energy of an isolated system always decreases.