Changes in the state of matter (solid, liquid, gas) are the result of different energy levels at the molecular level. Look
at the graph of the energy required to go from water ice to water
vapor. Describe the energy of the water molecules for each state

Which is the most concentratic acid

What are the trends and exceptions to the trends in electron affinity?

Suppose a pair of chemical compounds a and b can react in two different ways: a + b -> c reaction 1 gives product c. a + b -> d reaction 2 gives product d. the following facts are known about the two reactions: . reaction 1 is endothermic and reaction 2 is exothermic. if a reaction vessel is charged (filled) with a and b , then at first d is produced faster than c. use these facts to sketch a qualitative reaction energy diagram for both reactions. note: because these sketches are only qualitative, the energies don? t have to be exact. they only have to have the right relationship to each other. for example, if one energy is less than another, that fact should be clear in your sketch.