A) its temperature deacreases
B)its temperature increases
C)it absorbs heat
D)It gives off heat
2007-02-23 17:59:06 · 4 answers · asked by DARNELL B 1 in Science & Mathematics ➔ Chemistry
It's D for sure.
For a given substance, condensation (or liquid formation) requires that the vapor phase atoms or molecules come together and form bonds. Forming bonds means energy is reduced in the gas so it must be releasing that energy to the surroundings (conservation of energy).
It is important to realize that DURING a phase transition, temperature is always CONSTANT. This is the subtlety to this question, as it only addresses the actual condensation-- NOT some transformation that passes through the boiling point.
Hope this helps!
2007-02-23 18:56:24 · answer #1 · answered by skyechem 2 · 0⤊ 0⤋
A and D both sound right...but I'd go with D on this one because the giving off of heat(i.e. energy) is what makes this transition possible. Temperature can range greatly but it doesn't necessarily mean that the phase will change especially with pressure in consideration.
2007-02-24 02:16:57 · answer #2 · answered by Shaun 4 · 0⤊ 0⤋
D. It gives off heat. Condensation is an exothermic phase transition.
2007-02-24 02:11:36 · answer #3 · answered by Elisa 4 · 0⤊ 0⤋
A
2007-02-24 02:03:37 · answer #4 · answered by Teelo 2 · 0⤊ 0⤋