Problem $07\mathrm{.}088-$ Air in an insulated piston$-$cylinder device

Skip to question

An insulated piston$$cylinder device initially contains $340\mathrm{.}0$ L of air at $120$ kPa and $17$C$.$ Air is now heated for $15$ min by a $200-$W resistance heater placed inside the cylinder. The pressure of air is kept constant during this process.

Problem $07\mathrm{.}088.$a $-$ Entropy change of air assuming constant specific heats

Determine the entropy change of air assuming constant specific heats. The gas constant of air is R $=0\mathrm{.}287$ kJ$/$kg$$K$.($Round the final answer to three decimal places.$)$

$$

The entropy change of air is kJ$/$K$.$