Prob. $1$ A car engine running at idle speed and its gear position at neutral, please discuss its interactions with surroundings. $(10\%)$

Prob. $2$ Please depict the meanings of "ideal gas" and "ideal processs," and please write down all the equations and$/$or property relations that you can think of when you make the assumptions of ideal gas behavior for a pure, simple, compressible closed system undergoing an adiabatic and reversible process. $(15\%)$

ch$6$P$\mathrm{.}16$

Prob. $3$ Please illustrate Clausius inequality principle with an example system undergoing processes. $(15\%)$