Heat
In the First law demo question you were asked to determine the change in internal energy of the ideal gas. Your submitted answer indicates that you had trouble with the heat in your calculation. For more information on the first law of thermodyanmics see this wikipedia page.
Missing
In the First law demo question you were asked to determine the change in internal energy of the ideal gas. Your submitted answer indicates that you incorrectly neglected the heat in your calculation. For more information on the first law of thermodyanmics see this wikipedia page.
Sign
In the First law demo question you were asked to determine the change in internal energy of the ideal gas. Your submitted answer indicates that you incorrectly used the opposite sign on the heat compared to the model answer. This typically occurs when "removed from" or "added to" is identified incorrectly. For more information on the first law of thermodyanmics see this wikipedia page.
