[lostfan176]

For which of these systems is the system’s energy conserved in every process: (a) a closed system; (b) an open system; (c) an isolated system; (d) a system enclosed in adiabatic walls? Please provide a brief explanation for your answer.

a. yes matter is not transferable
b. no matter is transferred
c. yes, no interaction
d. yes adiabatic does not conduct heat

r these correct?

[Aeon]

Well, it depends on the definition of "closed" and "isolated". To me, closed is not necessarily isolated.

Since ,
where internal energy, heat and work,

 then in what case is  ?

The questions seems oddly phrased: a system enclosed in adiabatic walls sounds pretty much like a closed and isolated system to me...

[SABRY]

Agree with Aeon.

It seems the adiabatic wall is most likely the good answer.

[juanrga]

For which of these systems is the system’s energy conserved in every process: (a) a closed system; (b) an open system; (c) an isolated system; (d) a system enclosed in adiabatic walls? Please provide a brief explanation for your answer.

a. yes matter is not transferable
b. no matter is transferred
c. yes, no interaction
d. yes adiabatic does not conduct heat

r these correct?

a. no because can transfer energy

$$ \Delta U = Q + W /$$

b. no because can transfer both energy and matter

$$ \Delta U = Q + W + \Delta U_{matter} /$$

c. yes, no interaction

$$ \Delta U = 0 /$$

d. no because it can transfer energy by other means, e.g. changes in volume.

$$ \Delta U = W /$$