CEM 141 Exam 3 Questions and Answers Already Passed

CEM 141 Exam 3 Questions and Answers Already Passed change of state from solid -> liquid -> gas ________ energy requires energy needed to phase change from solid --> liquid --> gas comes from: the surroundings when phases change from solid --> liquid --> gas, interactions are _______ between molecules overcome change of state from gas --> liquid --> solid ______ energy releases what happens to the energy from a phase change from gas --> liquid --> solid? released to surroundings when phases change from gas --> liquid --> solid, interactions are _______ between molecules formed what happens when a substance melts? the interactions between the particles have to be overcome -- so that they can remove relative to each other (that's what allows a liquid to flow) melting and boiling points provide an estimate of: the strength of the attractive interactions between particles which is stronger?? covalent bond/LDF covalent bond in a covalent bond, what is formed? a new molecule what is a LDF caused by? fluctuating charge distribution covalent bonds are the sharing of: valence electrons LDF's increase with.... the size of electron cloud covalent bonds are caused by: attraction between electrons of one atom and the nucleus of another LDFs are present where??? between all molecular species is it hard or easy to predict covalent bond strength? hard when are covalent bonds present? when