What will exothermic process do to it’s surrounding? what will an endothermic process do to it’s surrounding

Is this a single replacement reaction or there is no

One does not belong why? ice, gold ,wood ,diamond and table salt

How many mmols of tris-hcl are there in 100 ml of a 100 mm tris-hcl buffer solution at ph 8.1? note that the 100 mm refers to the sum of tris and tris-hcl concentrations?