3. For the Carnot engine cycle for a system containing one mole of ideal gas (p,V data points given below), calculate the change in entropy of the system for each stage of the cycle (Steps 1, 2, 3, and 4) and the overall change in entropy of the system for a complete cycle. You may assume that each measurement of the data is accurate to at least two significant figures. Data Points (p,V): Point A: p = 70 kPa, V = 0.100 m3 Point B: p = 35 kPa, V = 0.200 m3 Point C: p = 10 kPa, V = 0.400 m³ Point D: p = 20 kPa, V = 0.200 m3 Step 1: Isothermal expansion from point A to point B. Step 2: Adiabatic expansion from point B to point C. Step 3: Isothermal compression from point C to point D. Step 4: Adiabatic compression from point D back to point A.

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Entropy

In physics, entropy means the amount of disorder or the degree of randomness associated with a thermodynamic system. The system is not self-organized when the entropy of the system is high. For instance, when a system is at an elevated temperature, its molecules are in random motion, vibrating and colliding with each other. During this scenario, the probability of finding a molecule at a particular place twice, is low. Under this circumstance, the system can be said to be in a high entropy.