(le). For an ideal gas, which of the following parameters is not a function of t

Question

(le). For an ideal gas, which of the following parameters is not a function of temperature only (A) Specific enthalpy,h (B) Specific internal energy, u (C) Specific heat at constant volume C (D) Specific heat at constant pressure C (E) None of the above (1f). A substance whose specific volume (or density) is constant is called an (A) Compressible substance (B) Incompressible substance (C) Material substance (D) Chemical substance (E) None of the above t low pressures, all real gases approach ideal-gas behavior, and therefore their specific heats (1g). A depend on: (A) pressure only (B) temperature only (C) gas constant only (D) All of the above (E) None of the above

Explanation / Answer

Answer to 1 e

Enthalpy in general is a function of temperature ( Cp*dT) and for ideal gas it is a function of temperature .

For internal energy also ( U =Cv*dT). Just like enthalpy, internal energy also is a function of temperature.

Now for ideal Gas Cp, Cv both actually are a function of temperature ( We can see it from the fundamental definition of Heat capacity itself which is heat required to raise the temperature by 1 oC)

Hence correct option is option (E): None of the above

1f)

Now since the density is constant the substance cannot be compressed or deformed

Hence correct option is option (B) Incompressible

Answer to 1g)

Heat in general is a function of Temperature and pressure but when the gas approaches to ideality that is ideal gas, than the specific heat only depends on Temperature

Hence, answer is option (B) Temperature only

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