>>7
Look at PV=nRT ... if by "enclosed" you mean "can't change in volume", then as
T rises, the only other variable that can change is
P.
V can't change since the liquid is enclosed.
R and
n can't change since they are constants. So in an enclosed fluid, a rise in temperature (induced from the outside) will cause the pressure in the fluid to rise.
>>8
That's not really enclosed. That's just "contained", and in most fluid problems, there is some container used. Of course, there is the special case when the fluid is enclosed, but there's also a gas in the enclosure with it. A fine example is a 2-liter of soda. There's a little bit of gas-filled space above the liquid. That little bit of space is going to change how the pressure changes.
(Thanks for the link 4tran. Bernie's E is only one of the most famous equations by name. I guess I gotta facepalm myself, LOL.)