What is the sign convention when work is done on the system by the surrounding?

if work is done by the system then W is

w is positive when the work is done on the system.

When heat is released during the reaction, it is denoted as _______ and when work is done on system by the surroundings, it is denoted as _______ .

In a certain chemical process, a lab technician supplies 254 J of heat to a system. At the same time, 73 J of work are done on the system by its surroundings. What is the increase in the internal energy of the system?

What would be the sign convention for work done on a system for a cylinder containing one mole of an ideal gas where P_(ext) = P_(int) ?

The sign convention for electrical work is

Pick out the correct option which represents for the work done by the system on the surroundings

A system is provided with 200 cal of heat and the work done by the system on the surrounding is 40J . Then its internal energy