Por or Para

Question

Tiene que terminar este proyecto (para) manana.

Salio de la oficina (por) su casa.

Are these sentences correct? Thanks

Answer 1

https://www.spanishdict.com/guide/quick-tips-for-understanding-por-and-para

"A trick to understanding when to use por and when to use para is knowing which preposition is associated with a cause and which is associated with an effect. Por typically refers to an action’s cause while para refers to its effect. This might be a little confusing at first so let’s use some examples."

Keep reading on that website!