Periodic Trends in Ionization Energy
Referring to the periodic table, arrange the atoms Ne, Na, P, Ar, K in order of increasing first ionization energy.
Which has the lowest first ionization energy, B, Al, C, or Si? Which has the highest?
CEM 141 Lecture 37: Enthalpy Dr. Jian Hu th December 5 , 2016 Phase Change Added heat is used to overcome attractive interactions between molecules Water in the gaseous phase still exists in molecules (LDFs are the only forces overcome) During phase changes, temperature does not change until after the phase change is complete During melting or boiling, energy is added from the surroundings and used to overcome the IMFs between the molecules (or ions) During condensation or freezing, energy from the formation of new interactions is being released into the surroundings Systems and Surroundings System: the part we study Surroundings: everything else There may be a real or imagina