The incorrect statement among following is 1) when a substance is in its thermodynamics standard state, the substance must be at 25⁰C 2) heat capacity at constant pressure is an extensive property. 3) Reversible process can be reversed at any point in the process by making infinitesimal change. 4) Molar internal energy is an intensive property.
Heat capacity is an extensive property.
The amount of internal energy depends on the size or amount of the system. The properties which depends on the size or amount are called as extensive properties and vice-versa are the intensive properties. But the molar internal energy is an intensive property because its amount is fixed.
The definition of a reversible process is the process which can be reversed by the infinitesimally small change. So, this option is also true.
Hence the option 1) is incorrect. The thermodynamic state is called as standard at any temperature T but the pressure must be equal to 1 bar.
The amount of internal energy depends on the size or amount of the system. The properties which depends on the size or amount are called as extensive properties and vice-versa are the intensive properties. But the molar internal energy is an intensive property because its amount is fixed.
The definition of a reversible process is the process which can be reversed by the infinitesimally small change. So, this option is also true.
Hence the option 1) is incorrect. The thermodynamic state is called as standard at any temperature T but the pressure must be equal to 1 bar.