Respuesta :
The complete question is;
The first law of thermodynamics is usually written as
Q=W+?U.
You need to look at the signs carefully; some other disciplines (chemistry, for example) may use other signs, which implies other definitions of these quantities.
1-Which physical law underlies the first law of thermodynamics?
-conservation of matter
-increase in entropy
-conservation of energy
-conservation of work
2- The quantity Q is the __________ that is added to the system.
-heat
- work
-entropy
-internal energy
3-The quantity W in the first law refers to the __________.
-work done on the system
-work done by the system
-change of energy in the system
-change of volume in the system
4)The quantity ΔU in the first law of thermodynamics is the change in the __________ of the system.
-entropy
-internal energy
-heat energy
-temperature
Answer:
1) Otption C - conservation of energy
2) Option A - Heat
3)Option B - work done by the system
4)Option B - Internal energy
Explanation:
The first law of thermodynamics which is actually based on the principle of conservation of energy states that the change in internal energy of a system equals the net heat transfer into the system minus the net work done by the system. In equation form, the first law of thermodynamics is ΔU = Q − W.
Thus, from this definition, we can answer the questions;
1)Option C - Conservation of Energy
2) Q is the heat added to the system. - Option A
3) W is the work done by the system
4)ΔU is the change in the internal energy of the system.
