How do you know the state of water as the product of a combustion reaction? And do the data book's combustion enthalpy values consider water as a liquid or gas?
Hello. The data book's heat of combustion values consider water as a liquid as the heats of combustions were calculated at 25 degrees celsius where water is a liquid. My teacher told us to write water as a liquid for this reason.
Also, I had a few questions to ask.
I'm a bit confused about the concept of salt bridges in galvanic cells. So, I know that salt bridges contain cations which flow to the cathode and anions that flow to the anode, thus allowing the charges to be neutral at each of the half cells. However, I was wondering why it was a bad thing if they're not neutral? Why is it bad if one half-cell is negatively charged (cathode where reduction is happening) and one half-cell is positively charged where oxidation is happening?
Also, I'm confused about the concept of 'salt bridges completing the circuit'. What does that mean and why is it important in producing electrical energy?
Also from the VCAA 2010 Exam, question 7 d, I'm a bit confused about why the Lithium ions move as well? I thought only the ions ions in the electrolyte moved to achieve neutrality?