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Entropy Calculator
The Entropy Calculator will calculate the:
- Change in the entropy of a thermodynamic system in terms of heat exchanged and temperature of system
- Change in the entropy of a system in terms of gas parameters and molar specific heats
Note: Write the ΔQ value as negative when the system releases heat to its surroundings.
The change in the entropy of a thermodynamic system in terms of heat exchanged and temperature of system is:
|
| The change in the entropy of a thermodynamic system in terms of volume, temperature and molar specific heat at constant volume J/K |
| The change in the entropy of a thermodynamic system in terms of pressure, temperature and molar specific heat at constant pressure J/K |
| Change in entropy of system in terms of heat and temperature calculations |
|---|
Hot object calculation∆S1 = ∆Q/T1∆S1 = /T1 ∆S1 = Cold object calculation∆S2 = ∆Q/T2∆S2 = / ∆S2 = Universe calculation∆Suniverse = ∆S1 + ∆S2 |
| Change in entropy in terms of V, T and CV calculation |
| ∆S = CV × lnT2/T1 + R × lnV2/V1 ∆S = × ln/ + × ln/ ∆S = × ln() + × ln() ∆S = × + × ∆S = |
| Change in entropy in terms of P, T and CP calculation |
| ∆S = CP × lnT2/T1 - R × lnP2/P1 ∆S = × ln/ - × ln/ ∆S = × ln() - × ln() ∆S = × - × ∆S = |
| Entropy Calculator Input Values |
| Initial pressure of gas (P1) Pa |
| Initial volume of gas (V1) m3 |
| Initial temperature of gas (T1) K |
| Final pressure of gas (P2) Pa |
| Final volume of gas (V2) m3 |
| Final temperature of gas (T2) K |
| Heat exchanged during the process (ΔQ) J |
| Ideal gas constant (R) J/mol∙K |
| Molar specific heat at constant volume (CV) J/mol∙K |
| Molar specific heat at constant pressure (CP) J/mol∙K |
Please note that the formula for each calculation along with detailed calculations are available below. As you enter the specific factors of each entropy calculation, the Entropy Calculator will automatically calculate the results and update the Physics formula elements with each element of the entropy calculation. You can then email or print this entropy calculation as required for later use.
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Related Physics Chapters with Tutorials
Change in entropy of system in terms of heat and temperature Formula and Calculation
Hot object Formula
∆S1 = ∆Q/T1Cold object Formula
∆S2 = ∆Q/T2Universe Formula
∆Suniverse = ∆S1 + ∆S2 = ∆Q/T1 + ∆Q/T2Change in entropy in terms of V, T and CV Formula and Calculation
Change in entropy in terms of P, T and CP Formula and Calculation
Thermodynamics Physics Tutorials associated with the Entropy Calculator
The following Physics tutorials are provided within the Thermodynamics section of our Free Physics Tutorials. Each Thermodynamics tutorial includes detailed Thermodynamics formula and example of how to calculate and resolve specific Thermodynamics questions and problems. At the end of each Thermodynamics tutorial you will find Thermodynamics revision questions with a hidden answer that reveals when clicked. This allows you to learn about Thermodynamics and test your knowledge of Physics by answering the test questions on Thermodynamics.
- 13.1 - Temperature. The Zeroth Law of Thermodynamics
- 13.2 - Thermal Expansion
- 13.3 - Absorption of Heat
- 13.4 - Calorimetry (Heat Transfer)
- 13.5 - The First Law of Thermodynamics
- 13.6 - The Kinetic Theory of Gases. Ideal Gases
- 13.7 - Pressure, Temperature and RMS Speed
- 13.8 - Molar Specific Heats and Degrees of Freedom
- 13.9 - Gas Laws
- 13.10 - Entropy and the Second Law of Thermodynamics
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