When can there be negative work in chemistry

In chemistry, anything going out of the system is negative and anything coming into the system is positive. An example being is if your system is a gas in a piston, work is being done on the system when it is being compressed, so the work done on the system is positive, and the work done by the system is negative

hope this helps <3

29.1-12=17.1the answer is this one

Iwould you figure it out but you don't have a picture or in your question as to what the physical property you're looking for is