1. Tardigrade
  2. Question
  3. Chemistry
  4. Statement 1: The increase in internal energy (Δ E) for the vaporisation of 1 mole of water at 1 atm and 373K is zero. Statement 2: For all isothermal processes Δ E = 0.

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Q. Statement 1: The increase in internal energy $\left(\Delta E\right)$ for the vaporisation of 1 mole of water at 1 atm and $373K$ is zero.
Statement 2: For all isothermal processes $\Delta E = 0.$

Thermodynamics

Solution:

The statement 1 that the increase in internal energy for the vaporisation of lmole of water at 1 atm and $373 K$ is zero is true because for all isothermal process internal energy is zero.