The gas thermometers are more sensitive than liquid thermometers because gases

Options

A. Expand more than liquids
B. Are easily obtained
C. Are much lighter
D. Do not eaasily change their states

Answer

To answer the question of why gas thermometers are more sensitive than liquid thermometers, we can break down the explanation into clear, logical steps:

### Step-by-Step Solution:

1. **Understanding Thermometers**:
- Thermometers are devices used to measure temperature. There are different types of thermometers, including gas thermometers and liquid thermometers.

2. **Expansion Properties**:
- The sensitivity of a thermometer is largely dependent on how much the substance inside it expands or contracts with a change in temperature.

3. **Volume Expansion Coefficient**:
- The volume expansion coefficient (γ) is a measure of how much a substance expands per degree change in temperature. For gases, this coefficient is significantly higher than that for liquids.

4. **Comparison of Gases and Liquids**:
- Gases have a much greater volume expansion coefficient compared to liquids. This means that for a small increase in temperature, a gas will expand more than a liquid will.

5. **Sensitivity of Gas Thermometers**:
- Because gases expand more significantly than liquids for the same temperature change, gas thermometers can detect smaller changes in temperature. This makes them more sensitive.

6. **Practical Considerations**:
- Additionally, gases are lighter and do not easily change their state (i.e., they remain in the gaseous state under normal conditions), which contributes to the reliability and sensitivity of gas thermometers.

7. **Conclusion**:
- Therefore, gas thermometers are more sensitive than liquid thermometers primarily because gases expand more than liquids for the same change in temperature.

### Final Answer:
Gas thermometers are more sensitive than liquid thermometers because gases expand more than liquids for a given change in temperature.

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