Question

Draw/Make an illustration of an example of work and heat. Label correctly how the work is done and how the heat flows. 

Answer 1

If there are more energy transfer quantities involved in the process, the first law of thermodynamics gives,

$(Q_2+Q_3-Q_1)=\Delta E+(W_3+W_2-W_1-W_4)$

Heat transferred to the system is taken as positive while work done on the system is taken as negative.