Please explain every process or statement. Consider a vertical cylinder having a connected tube$-$valve initially contains ideal air with constant specific heats at room temperature. Once the valve is opened air escapes at constant pressure and temperature until the air volume goes down by half. Analyze the process as a uniform$-$flow process since the exit temperature remains constant and since there are no work interactions other than boundary work.

$4\mathrm{.}1$ The initial mass of air in the cylinder is $m_1=0\mathrm{.}825Kg$

True False

$4\mathrm{.}2$ The final mass of air in the cylinder is $m_2=0\mathrm{.}625Kg$

True False

$4\mathrm{.}3$ The mass balance yields $m_e=0\mathrm{.}357Kg$

True False

$4\mathrm{.}4$ For a constant pressure process, the boundary work and the internal energy change can be combined into enthalpy change. If the temperature of air remains constant during the process, then the heat transfer is mathematically determined as $Q=0.$

True False

$4\mathrm{.}5$ If the cylinder is taken as the thermodynamic system, then the cylinder is a control volume $($CV since mass crosses the system boundary.

True False