Question

If we consider a gallon of gas as having 100 units of energy, and 25 of those units are used to move the car, what law of thermodynamics accounts for the other 75 units of energy

A the first law
B the second law

Answer 1

A first law

Answer 2

The First Law of Thermodynamics
\[\delta U= \delta W + \delta Q\] the internal energy of the gas is converted to work and heat

where \[\delta U= 100\]change in internal energy

\[\delta W =25\] change in work
\[\delta Q =75\] change in heat