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FAQs on Clausius Clapeyron Equation, Thermodynamics - Mechanical Engineering

1. What is the Clausius Clapeyron equation?
Ans. The Clausius Clapeyron equation is a mathematical relationship that describes the behavior of the vapor pressure of a substance as a function of temperature. It shows the dependence of vapor pressure on temperature and can be used to calculate the change in vapor pressure with temperature.
2. How is the Clausius Clapeyron equation derived?
Ans. The Clausius Clapeyron equation is derived by considering the phase equilibrium between a liquid and its vapor. By applying the first and second laws of thermodynamics, the equation is developed and expresses the logarithmic relationship between the vapor pressure and temperature of a substance.
3. What is the significance of the Clausius Clapeyron equation in thermodynamics?
Ans. The Clausius Clapeyron equation is significant in thermodynamics as it provides a way to determine the change in vapor pressure with temperature. It is particularly useful in understanding phase transitions and predicting the behavior of substances at different temperatures.
4. How can the Clausius Clapeyron equation be used to determine the boiling point of a substance?
Ans. The Clausius Clapeyron equation can be used to estimate the boiling point of a substance by plotting the logarithm of the vapor pressure against the reciprocal of the temperature. By extrapolating the resulting line to the temperature axis, the boiling point can be determined.
5. Can the Clausius Clapeyron equation be applied to all substances?
Ans. The Clausius Clapeyron equation is applicable to substances that exhibit ideal gas behavior or follow the ideal gas law. It is generally accurate for substances with low pressures and temperatures. However, it may not hold true for substances with high pressures or when there are significant deviations from ideal gas behavior.
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