Entropy Change for System and surrounding

If the change in entropy of reversible isothermal expansion of 1 mol of an ideal gas is 9.135 " J mol"^(-1). K^(-1) , what will be the entropy change of the surroundings and universe ? If the above expansion of gas is allowed to occur against zero pressure, what will be the entropy change of the system and surroundings ?

The total entropy change for a system and its surroundings increases, if the process is

The total entropy change for a system and its surroundings increases, if the process is

The total entropy change for a system and its surrounding increases, if the process is

Calculate the entropy change in the system and surroundings, and the total entropy change in the universe during a process in which 245 J of heat flow out of the system at 77^@C to the surrounding at 33^@C .