In an adiabatic process

Options

A. `DeltaT=0`
B. `DeltaQ=0`
C. `DeltaP=0`
D. `DeltaU=0`

Answer

To solve the question regarding the characteristics of an adiabatic process, we need to analyze the options provided and understand the definition of an adiabatic process.

### Step-by-step Solution:

1. **Understanding Adiabatic Process**:
- An adiabatic process is defined as a thermodynamic process in which there is no heat transfer into or out of the system. This means that the system is perfectly insulated.

2. **Analyzing the Options**:
- **Option a**: ΔT = 0
- This option suggests that there is no change in temperature. However, in an adiabatic process, the temperature can change due to work done on or by the system.
- **Option b**: ΔQ = 0
- This option states that the change in heat (Q) is zero. This is consistent with the definition of an adiabatic process, where no heat is exchanged with the surroundings.
- **Option c**: ΔP = 0
- This option suggests that there is no change in pressure. However, pressure can change in an adiabatic process, especially if the volume of the gas changes.
- **Option d**: ΔU = 0
- This option states that the change in internal energy (U) is zero. However, internal energy can change in an adiabatic process due to work done on or by the system.

3. **Conclusion**:
- The only correct statement regarding an adiabatic process is that ΔQ = 0. Therefore, the correct answer is **Option b: ΔQ = 0**.

### Final Answer:
**b. ΔQ = 0**