Write a letter to persuade a friend that a change in temperature does not necessarily mean that a chemical change has occurred .
pysical science - DrBob222, Sunday, October 5, 2008 at 2:52pm
Just a hint and you do the rest. Potassium nitrate (KNO3) dissolved in water gets colder but a chemical reaction has not taken place. That's just due to the bonds breaking and it takes energy to break the bonds of the KNO3 crystal lattice.
pysical science - unnamee, Tuesday, October 26, 2010 at 5:26pm
well the change has occured but not a physical change. The temperture changed by last week it being cold and this week its very warm so that's it