## Entropy Change Variable Specific Heat Solution

STEP 0: Pre-Calculation Summary
Formula Used
Entropy Change Variable Specific Heat = Standard molar entropy at point 2-Standard molar entropy at point 1-[R]*ln(Pressure 2/Pressure 1)
δs = s2°-s1°-[R]*ln(P2/P1)
This formula uses 1 Constants, 1 Functions, 5 Variables
Constants Used
[R] - Universal gas constant Value Taken As 8.31446261815324
Functions Used
ln - The natural logarithm, also known as the logarithm to the base e, is the inverse function of the natural exponential function., ln(Number)
Variables Used
Entropy Change Variable Specific Heat - (Measured in Joule per Kilogram K) - Entropy Change Variable Specific Heat is the measure of a system’s thermal energy per unit temperature that is unavailable for doing useful work.
Standard molar entropy at point 2 - (Measured in Joule per Kilogram K) - Standard molar entropy at point 2 is the entropy of 1 mole of a substance at a standard temperature of 298 K.
Standard molar entropy at point 1 - (Measured in Joule per Kilogram K) - Standard molar entropy at point 1 is the entropy of 1 mole of a substance at a standard temperature of 298 K.
Pressure 2 - (Measured in Pascal) - Pressure 2 is the pressure at give point 2.
Pressure 1 - (Measured in Pascal) - Pressure 1 is the pressure at give point 1.
STEP 1: Convert Input(s) to Base Unit
Standard molar entropy at point 2: 188.8 Joule per Kilogram K --> 188.8 Joule per Kilogram K No Conversion Required
Standard molar entropy at point 1: 25.2 Joule per Kilogram K --> 25.2 Joule per Kilogram K No Conversion Required
Pressure 2: 5.2 Bar --> 520000 Pascal (Check conversion ​here)
Pressure 1: 2.5 Bar --> 250000 Pascal (Check conversion ​here)
STEP 2: Evaluate Formula
Substituting Input Values in Formula
δs = s2°-s1°-[R]*ln(P2/P1) --> 188.8-25.2-[R]*ln(520000/250000)
Evaluating ... ...
δs = 157.510754524986
STEP 3: Convert Result to Output's Unit
157.510754524986 Joule per Kilogram K --> No Conversion Required
157.510754524986 157.5108 Joule per Kilogram K <-- Entropy Change Variable Specific Heat
(Calculation completed in 00.004 seconds)
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Created by Suman Ray Pramanik
Indian Institute of Technology (IIT), Kanpur
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## <Entropy Generation Calculators

Entropy Change at Constant Volume
​ Go Entropy Change Constant Volume = Heat Capacity Constant Volume*ln(Temperature of Surface 2/Temperature of Surface 1)+[R]*ln(Specific Volume at Point 2/Specific Volume at Point 1)
Entropy Change at Constant Pressure
​ Go Entropy Change Constant Pressure = Heat Capacity Constant Pressure*ln(Temperature of Surface 2/Temperature of Surface 1)-[R]*ln(Pressure 2/Pressure 1)
Entropy Change Variable Specific Heat
​ Go Entropy Change Variable Specific Heat = Standard molar entropy at point 2-Standard molar entropy at point 1-[R]*ln(Pressure 2/Pressure 1)
Entropy Balance Equation
​ Go Entropy Change Variable Specific Heat = Entropy of System-Entropy of Surrounding+Total Entropy Generation

## Entropy Change Variable Specific Heat Formula

Entropy Change Variable Specific Heat = Standard molar entropy at point 2-Standard molar entropy at point 1-[R]*ln(Pressure 2/Pressure 1)
δs = s2°-s1°-[R]*ln(P2/P1)

## What is Entropy change variable specific heat?

Entropy change variable specific heat is the measure of a system’s thermal energy per unit temperature that is unavailable for doing useful work. It is a state function and hence depends on the path taken by the system. Entropy is a measure of randomness.

## How to Calculate Entropy Change Variable Specific Heat?

Entropy Change Variable Specific Heat calculator uses Entropy Change Variable Specific Heat = Standard molar entropy at point 2-Standard molar entropy at point 1-[R]*ln(Pressure 2/Pressure 1) to calculate the Entropy Change Variable Specific Heat, Entropy change variable specific heat is the measure of a system’s thermal energy per unit temperature that is unavailable for doing useful work. Entropy Change Variable Specific Heat is denoted by δs symbol.

How to calculate Entropy Change Variable Specific Heat using this online calculator? To use this online calculator for Entropy Change Variable Specific Heat, enter Standard molar entropy at point 2 (s2°), Standard molar entropy at point 1 (s1°), Pressure 2 (P2) & Pressure 1 (P1) and hit the calculate button. Here is how the Entropy Change Variable Specific Heat calculation can be explained with given input values -> 157.5108 = 188.8-25.2-[R]*ln(520000/250000).

### FAQ

What is Entropy Change Variable Specific Heat?
Entropy change variable specific heat is the measure of a system’s thermal energy per unit temperature that is unavailable for doing useful work and is represented as δs = s2°-s1°-[R]*ln(P2/P1) or Entropy Change Variable Specific Heat = Standard molar entropy at point 2-Standard molar entropy at point 1-[R]*ln(Pressure 2/Pressure 1). Standard molar entropy at point 2 is the entropy of 1 mole of a substance at a standard temperature of 298 K, Standard molar entropy at point 1 is the entropy of 1 mole of a substance at a standard temperature of 298 K, Pressure 2 is the pressure at give point 2 & Pressure 1 is the pressure at give point 1.
How to calculate Entropy Change Variable Specific Heat?
Entropy change variable specific heat is the measure of a system’s thermal energy per unit temperature that is unavailable for doing useful work is calculated using Entropy Change Variable Specific Heat = Standard molar entropy at point 2-Standard molar entropy at point 1-[R]*ln(Pressure 2/Pressure 1). To calculate Entropy Change Variable Specific Heat, you need Standard molar entropy at point 2 (s2°), Standard molar entropy at point 1 (s1°), Pressure 2 (P2) & Pressure 1 (P1). With our tool, you need to enter the respective value for Standard molar entropy at point 2, Standard molar entropy at point 1, Pressure 2 & Pressure 1 and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.
How many ways are there to calculate Entropy Change Variable Specific Heat?
In this formula, Entropy Change Variable Specific Heat uses Standard molar entropy at point 2, Standard molar entropy at point 1, Pressure 2 & Pressure 1. We can use 1 other way(s) to calculate the same, which is/are as follows -
• Entropy Change Variable Specific Heat = Entropy of System-Entropy of Surrounding+Total Entropy Generation
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