¿Por que la energía se puede transferir, almacenar o disipar pero no crear y destruir?

What are two different ways you could find the value of a? explain these methods.

Which of the following statements are true for an isothermal process? check all that apply. - during an isothermal process, the work done by the gas equals the heat added to the gas. - during an isothermal process, the internal energy of the system changes. - an isothermal process is carried out at constant temperature. - an isothermal process is carried out at constant pressure. - an isothermal process is carried out at constant volume.

What happens when the vapor pressure of a liquid is equal to the external pressure?