Which of the following is true for an adiabatic process:

Options

A. `DeltaH=0`
B. `DeltaW=0`
C. `dq=0`
D. `DeltaV=0`

Explanation

To solve the question regarding the characteristics of an adiabatic process, we will analyze the options provided and apply the principles of thermodynamics.

### Step-by-Step Solution:

1. **Understanding Adiabatic Process**:
- An adiabatic process is defined as one in which no heat is exchanged with the surroundings. This means that the system is thermally insulated from its environment.

2. **Analyzing the Options**:
- **Option A**: Change in enthalpy is equal to 0.
- This is incorrect. In an adiabatic process, the enthalpy can change depending on the work done on or by the system.

- **Option B**: Change in work done is equal to 0.
- This is also incorrect. Work can be done on or by the system during an adiabatic process, so the change in work done is not necessarily zero.

- **Option C**: Change in heat is equal to 0.
- This is correct. Since an adiabatic process is defined by the absence of heat transfer, the change in heat (Q) is indeed zero (ΔQ = 0).

- **Option D**: Change in volume is equal to 0.
- This is incorrect. The volume of the system can change during an adiabatic process, especially in cases of gas expansion or compression.

3. **Conclusion**:
- The only true statement regarding an adiabatic process from the options provided is **Option C**: Change in heat is equal to 0.

### Final Answer:
**Option C: Change in heat is equal to 0.**