Emotional appeals, such as evoking joy, sadness, fear and pity in an audience can boost students' argumentation. This link provides helpful advice and information on how to apply emotion into arguments and be convincing at the same time! I find that students enjoy this mode very much as they can show passion and feeling in their essays!
I find that this grid is very helpful for students in understanding the three modes of persuasion and the grid form means that they can use it as a guide when they are writing. It also gives examples of how Ethos, Pathos and Logos can be accentuated in rhetorical writing.