Question

A monoatomic ideal gas undergoes an isothermal expansion at 300 K, as the volume increased from 0.010 m^3 to 0.040 m^3. The final pressure is 130 kPa. What is the change in the internal (thermal) energy of the gas during this process? (R=8.31 J/mol . K) a. 0.0 kJ b. 3.6 kJ c. 7.2 kJ d.-3.6 kJ e.-7.2 kJ

Answer 1

Answer:

A) 0.0 kJ

Explanation:

Change in the internal energy of the gas is a state function

which means it will not depends on the process but it will depends on the initial and final state

Also we know that internal energy is a function of temperature only

so here the process is given as isothermal process in which temperature will remain constant always

here we know that

$\Delta U = \frac{3}{2}nR\Delta T$

now for isothermal process since temperature change is zero

so change in internal energy must be ZERO