In the first law of thermodynamics does temp. increase,decrease,orstay same when pressure and volume increase?

Question

im not too sure what happens and it also asks for explanation.can anyone help me with an explanation please.

Answer 1

assuming that the pressure and volume are increasing at similar rates, the temp should stay the same. if the pressure is going faster, the temp will rise, if the volume is increasing faster, the temp will drop.

just picture a can of WD-40, if youve ever gotten your hand sprayed, its cold because its going from high pressure to low pressure. and if you try to put too much into a can, you can imagine that it would get hot and blow up.

Answer 2

well, since

T == P/V

the short answer is, it depends.
let's say the pressure increases by a lot (let's say it doubles) and the volumes also doubles. The relationship between P and V remains the same ratio, meaning that T stays the same. If P increases a lot and V only increases a little then T will increase.

Answer 3

Pressure by definiton is Energy content per Unit volume.
The energy content is a function of temperature of the containment. volume increases if its allowed to expand.
The more energy the volume contains the greater the pressure if the containment is not allowed to expand.
Since energy increases with temperature and if volume increases with the same proportion then the pressure remains the same.

Answer 4

it depends....if pressure increases temp increases, if volume increases temp decreases....most questions usually make one static and change the other variable....