Table of Contents
- 1 What is the reason behind the fact that the absolute entropy value is unattainable?
- 2 Why is absolute zero the limit?
- 3 Why is it possible to have an absolute zero representing the coldest temperature but not an absolute maximum temperature?
- 4 What does it mean if entropy is zero?
- 5 Why entropy is zero if atoms stop moving?
What is the reason behind the fact that the absolute entropy value is unattainable?
The postulate that the entropy be finite at any temperature implies that the pressure- and θ-dependent heat capacity becomes zero at absolute zero. That is, at absolute zero, the heat capacity vanishes whatever the values of P and θ.
Why is absolute zero the limit?
Now the zero in absolute zero makes sense: Absolute zero is the temperature at which the particles in a substance are essentially motionless. There’s no way to slow them down further, so there can be no lower temperature.
Why can an object not reach a temperature of absolute zero?
The temperature of an object is a measure of the average random motion energy (kinetic energy) of its atoms. Absolute zero is more of a fundamental limit than a reachable temperature. Absolute zero can never be perfectly reached because of quantum fluctuations.
Why is it possible to have an absolute zero representing the coldest temperature but not an absolute maximum temperature?
Absolute zero is -273.15 degrees C or -459.67 degrees F. At absolute zero the movement of the particles is at the minimum vibrational energy. In layman terms motion stops. Theoretically there can be no lower temperature because there is no way to lower the energy state of the elements further.
What does it mean if entropy is zero?
Zero entropy means perfect knowledge of a state ; no motion, no temperature, no uncertainty. Occurs at absolute zero. It’s when your knowledge of state is so complete that only one microstate is possible. So W (number of microstates) = 1.
How absolute zero was determined?
The theoretical temperature is determined by extrapolating the ideal gas law; by international agreement, absolute zero is taken as −273.15 degrees on the Celsius scale (International System of Units), which equals −459.67 degrees on the Fahrenheit scale (United States customary units or Imperial units).
Why entropy is zero if atoms stop moving?
At absolute temperature all the molecular motion ceases or stops . So randomness becomes zero. Hence, entropy is zero at absolute temperature. Entropy is a measure of randomness .