The question asks to identify the type of wall that prevents the flow of heat through it. This is a fundamental concept in thermodynamics related to the classification of boundaries of a system.
Correct Option: D) An adiabatic wall is defined as a wall that does not permit the flow of heat through it. In an adiabatic process, there is no heat exchange between the system and its surroundings, which is facilitated by an adiabatic boundary or wall. This is an idealized concept, but materials like insulation approximate adiabatic walls.
The question asks to identify a thermodynamic property that depends only on the initial and final states of a system, not on the path taken. This is a fundamental definition in thermodynamics.
D) State function
A state function (or point function) is a property of a system that depends only on the current state of the system, not on the path taken to reach that state. Examples include internal energy, enthalpy, entropy, Gibbs free energy, pressure, temperature, and volume. For a state function \(X\), the change \(\Delta X\) between an initial state 1 and a final state 2 is always \(X_2 - X_1\), irrespective of the process.
This question tests the understanding of fundamental thermodynamic concepts: state functions and path functions. A state function depends only on the initial and final states of a system, not on the path taken to reach that state. A path function, conversely, depends on the specific path or process followed between the initial and final states.
Correct Option: A) Work (w) is a path function because the amount of work done depends on the specific process or path followed between the initial and final states of a system.
The question asks to identify which of the given thermodynamic quantities is NOT a state function. A state function (or path-independent function) is a property of a system that depends only on the current state of the system, not on the path taken to reach that state. Conversely, a path function depends on the path taken.
Correct Option: C) Heat (q) is a path function, meaning its value depends on the specific path taken between two thermodynamic states, not just the initial and final states.
The question asks to identify the type of property whose value depends on the quantity or size of matter present in the system. This relates to fundamental concepts in thermodynamics and chemistry, specifically the classification of properties as intensive or extensive.
C) Extensive property — An extensive property is one whose value is proportional to the amount of matter in the system. For example, if you have 1 kg of water, its mass is 1 kg. If you take 2 kg of water, its mass is 2 kg. Similarly, the volume of 1 kg of water is different from the volume of 2 kg of water. Both mass and volume are extensive properties because their values depend on the quantity of matter.
The question asks to identify the type of property whose value does not depend on the amount or size of the matter present in a system. This is a fundamental concept in chemistry and physics, distinguishing between different types of thermodynamic properties.
D) Intensive property is the correct answer because its value is independent of the quantity or size of matter present in the system.