Unit-I Essential Of ThermodynamicsBy abdulslambsn@gmail.com / May 16, 2025 Quiz 1 | Unit-I Essential Of Thermodynamics Your Good Name: Your College Name: Morning/Evening/Private: Email: 1. Which of the following is a statement of the first law of thermodynamics? Energy cannot be created or destroyed Heat flows spontaneously from a hot object to a cold object The total energy of a system and its surroundings remains constant Entropy always decreases in a closed system None 2. Which of the following statements best defines entropy? It is a measure of disorder or randomness in a system It is a measure of the temperature of a system It is a measure of the total energy of a system It is the ability of a system to do work None 3. What does the second law of thermodynamics state? Energy cannot be created or destroyed The total energy of a system and its surroundings remains constant Entropy of an isolated system always increases Heat always flows from a colder body to a hotter body None 4. Which law of thermodynamics defines absolute zero? Zeroth Law First Law Second Law Third Law None 5. What is the relationship between the internal energy of a system and its surroundings in the first law of thermodynamics? ĪU = Q + W ĪU = Q - W ĪU = Q / W ĪU = QĆW None 6. Which process occurs at constant pressure? Isothermal Isobaric Adiabatic Isochoric None 7. Which of the following is an extensive property in thermodynamics? Temperature Volume Internal energy Both B & C None 8. The zeroth law of thermodynamics is essential for defining: Temperature Energy Work Entropy None 9. In an isothermal process, the temperature: Remains Constant Increases linearly Decreases Exponentially Changes Randomly None 10. Which term best describes the flow of energy through a living organism? Thermogenesis Bioenergetics Thermodynamics Entropy None 11. The concept of entropy applies to information theory as: The amount of disorder in a message. The total energy of a system. The probability of error. The heat content of a system. None 12. A decrease in entropy is seen in living organisms because: They obey the first law only. They operate in isolated systems. They create order internally at the expense of increased external entropy. They violate the second law of thermodynamics. None 13. Enthalpy is defined as: The heat content of a system at constant pressure. The entropy of a system. The disorder of a system. The temperature of a system. None 14. For a spontaneous reaction, the change in entropy must be: Positive Negative Zero Undefined None 15. The entropy of the universe: Remains Constant Always increases Always decreases Cycles periodically None 16. Gibbs free energy is defined as: ĪG = ĪH ā TĪS ĪG = ĪS ā TĪH ĪG = TĪS + ĪH ĪG = ĪH + TĪS None 17. Endergonic reactions: Have a Positive ĪG Have a Negative ĪG Are Exothermic Are Spontaneous None 18. At equilibrium, the Gibbs free energy of a system is: Positive Negative Zero Undefined None 19. Entropy is a measure of: Disorder Order Temperature Pressure None 20. A reversible process is one that: Occurs slowly Can be undone without any effect on the surroundings Occurs without any energy exchange Generates maximum entropy None 21. Which of the following is a state function? Heat Work Temperature Entropy None 22. The change in entropy of a system at constant temperature is given by: ĪS = ĪH - TĪU ĪS = q / T ĪS = ĪG - TĪS ĪS = ĪG / T None 23. The condition for spontaneity at constant temperature and pressure is: ĪG < 0 ĪG = 0 ĪG > 0 ĪG = ĪH - TĪS None 24. Enthalpy is a state function. This means that: It depends only on the initial and final states of the system It remains constant throughout a process It depends on the path taken by the system It is always positive None 25. Enthalpy change in a reaction can be determined experimentally using which of the following techniques? Calorimetry Spectroscopy Chromatography Electrophoresis None 1 out of 3 Thanks For Submitting Your Quiz !!