Which is less likely to be a reliable source of information, the webpage of a university or the webpage of a scientist who is trying to sell a new invention? provide evidence to support your claim, and explain your reasoning.

Select for each of the following statements whether it is correct or incorrect. (a) in an isothermal expansion of an ideal gas. (b) the temperature remains constant. (b) the pressure remains constant. (c) there is work done by the gas. (d) there is heat added to the gas. (e) the change in internal energy equals zero.