One of the many statements of the second law of thermodynamics is: heat cannot flow from a colder body to a warmer one without external aid. assume two systems, 1 and 2, at t1 and t2 (t2 > t 1). show that if a quantity of heat q did flow spontaneously from 1 to 2, the process would result in a decrease in entropy of the universe. (you may assume that the heat flows very slowly so that the process can be regarded as reversible. assume also that the loss of heat by system 1 and the gain of heat by system 2 do not affect t1 and t2.)

nacl or sodium chloride is an ionic compound. this is because an ionic compound pertains to a compound that consists of positively and negatively charged ions. in this case, na (sodium) has a tendency to lose one electron when it reacts with with other atoms, so the resulting sodium ion contains 11 protons and 10 electrons, thus making it positively charged (na+), when chlorine reacts, it usually gains one electron to form an ion called chloride, thus making it negatively charged ( since the ions are oppositely charged, they attract.

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explanation:

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