When work (w) is done by the system, the sign of w is negative. But when it is done on the system, the sign of w is positive, give reason.

if work is done by the system then W is

if work is done by the system then W is

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

w is positive when the work is done on the system. (T/F)

When heat (q) is absorbed by a system, the sign of q is positive, and when it is rejected by a system, the sign of q is negative. Why?

When the work is done by the system, w is taken as ......

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

Express the change in internal energy of a system when (i) No heat is absorbed by the system from the surroundings, but work (w) is done on the system. What type of wall does the system have ? ii) No work is done on the system, but q amount of heat is taken out from the system and given to the surroundings. What type of wall does the system have? (iii) w amount of work is done by the system and q amount of heat is supplied to the system. What type of system would it be?