Which of the following properties will change when system containing solution 1 will become solution 2? [2025]
Molar heat capacity
Density
Concentration
Gibbs free energy
(4)
Both these solutions have same molarity, so density and molar heat capacity will also be same as these are intensive properties. Amount of two solutions is different, so Gibbs free energy of the two solutions will be different, as Gibbs free energy is an extensive property.
An ideal gas undergoes a cyclic transformation starting from the point A and coming back to the same point by tracing the path A → B → C → D → A as shown in the three cases above.
Choose the correct option regarding : [2025]
(2)
When the system returns to the starting point, then change in state function in the process in zero. Internal energy is a state function and in all the three cases, system comes back to the starting point, so in all three cases .
Given below are two statements: [2025]
Statement I: When a system containing ice in equilibrium with water (liquid) is heated, heat is absorbed by the system and there is no change in the temperature of the system until whole ice gets melted.
Statement II: At melting point of ice, there is absorption of heat in order to overcome intermolecular forces of attraction within the molecules of water in ice and kinetic energy of molecules is not increased at melting point.
In the light of the above statements, choose the correct answer from the options given below:
Statement I is true but Statement II is false.
Both Statement I and Statement II are false.
Both Statement I and Statement II are true.
Statement I is false but Statement II is true.
(3)
During melting of a solid, the heat supplied is used to overcome the intermolecular attractive forces of the solid. Kinetic energy of the molecules remains unchanged; hence temperature remain unchanged.
