Precision quiz - Thermodynamics

Identify the incorrect statement among the following. - A: Entropy is a measure of disorder or randomness in a system, increasing in irreversible processes. - B: The entropy of an isolated system remains constant if the processes are reversible. - C: Consider cooling a closed system, total entropy change can be negative because energy is removed from the system.

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Identify the incorrect statement among the following. - A: Gibbs Free Energy change is negative for spontaneous reactions at constant temperature and pressure. - B: It's a thermodynamic potential that measures the maximum reversible work a thermodynamic system can perform. - C: The increase in Gibbs Free Energy of a system is directly proportional to the increase in its entropy.

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Identify the incorrect statement among the following. - A: In an isothermal process, the temperature of the system remains constant. - B: During such a process, the internal energy of an ideal gas does not change. - C: An isothermal expansion of a gas requires a change in external temperature to maintain constant temperature within the system.

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Identify the incorrect statement among the following. - A: In calorimetry, the heat lost by a hot object is equal to the heat gained by a cold object. - B: The principle of calorimetry states that in an isolated system, the total heat remains constant. - C: Specific heat capacity is irrelevant in calorimetry as it only concerns temperature changes.

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Identify the incorrect statement among the following. - A: Standard enthalpy of formation is the enthalpy change when one mole of a compound is formed from its elements in their standard states. - B: The standard enthalpy of formation for a pure element in its standard state is always zero. - C: Standard enthalpy of formation values are always positive since they involve bond formation.

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Identify the incorrect statement among the following. - A: Hess's Law states that the total enthalpy change for a reaction is the same, irrespective of the number of steps in the reaction. - B: According to Hess's Law, the enthalpy change of a reaction is directly proportional to the amount of reactants used. - C: It allows for the calculation of the enthalpy change of a reaction that is difficult to measure directly.

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Identify the incorrect statement among the following. - A: Specific heat capacity is the quantity of heat required to raise the temperature of a unit mass of a substance by one degree Celsius. - B: Heat capacity depends on the nature of the substance and the amount of substance present. - C: Molar heat capacity is the amount of heat required to raise the temperature of a gram of substance by one Kelvin.

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Identify the incorrect statement among the following. - A: The First Law of Thermodynamics states that the total energy of an isolated system is constant; energy can be transformed from one form to another, but cannot be created or destroyed. - B: According to the First Law of Thermodynamics, in an isolated system, the sum of internal energy changes, heat added to the system, and work done by the system is always zero. - C: The First Law of Thermodynamics implies that energy in a closed system is conserved, meaning the system's internal energy change equals the heat added minus the work done on the system.

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Identify the incorrect statement among the following. - A: Enthalpy change for a reaction is the heat absorbed or released under constant pressure. - B: The enthalpy change of a reaction is independent of the path taken and depends only on the initial and final states. - C: Endothermic reactions are characterized by a negative enthalpy change.

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Identify the incorrect statement among the following. - A: The Second Law of Thermodynamics states that the entropy of an isolated system always increases over time. - B: It implies that energy transformations are not completely efficient, as some energy is always lost as heat. - C: This law dictates that heat can spontaneously flow from a colder to a hotter body.

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