You place a balloon in a closed vacuum chamber at standard temperature and pressure (stp). you decrease the chamber temperature by half but keep the pressure constant. what happens to the balloon?

it doubles in volume.

it stays the same volume.

it expands to four times the original volume.

it reduces in size by half

if you do know the answer could you also explain it to me, ? i've gotten this on two quizzes and i pay attention to my lessons but i always get this one wrong.

just did the assignment and the answer was #1 +2 n

the enthalpy of formation of water is given as -285.8kj/mol, which states that the enthalpy of formation is negative.

negative enthalpy of formation indicates that the heat is released during the reaction process. the heat is released from reaction to the surroundings the enthalpy is expressed with a negative sign with the energy given out in the reaction process.

the formation of water takes place by giving out heat which is -285.8 kj/mol.