The reaction below proceeds spontaneously at 298 K. NH3(g) +Cl2(g)Right arrow. NH4Cl(s)

What is the sign of the entropy change, Delta. S?
Delta. S is negative because the product is less random than the reactants.
Delta. S is negative because the reactants are less random than the product.
Delta. S is positive because the product is less random than the reactants.
Delta. S is positive because the reactants are less random than the product.

conduction is the transfer of thermal energy (heat in transfer) due to collisions between the molecules in the object. collisions between adjacent atoms and molecules transfer kinetic energy from the warmer to the cooler object. the objects must be in physical contact.

a 20-cm-long, cylindrical graphite (pure carbon) rod is inserted into an oxidizing atmosphere at 1145 k and 1.013 x 105 pa pressure. the oxidizing process is limited by the diffu- sion of oxygen counterflow to the carbon monoxide that is formed on the cylindrical surface.