When 2 crystalline solid barium hydroxide octahydrate and crystalline solid ammonium nitrate are mixed in a beaker at room tempe
rature, a spontaneous reaction occurs. the temperature of the beaker contents rapidly falls to below 0º c. use this information to decide whether the reaction is exothermic or endothermic and what the signs of δh and δs are?
It is endothermic reaction ΔH>0 (sign is +). Because it is spontaneous reaction ΔG<span><0 (Gibbs free energy) </span>ΔG=ΔH-TΔS, so must be TΔS>ΔH and ΔS<span>>0 (sign +).</span>
frequency it the measure of the wave length. The measure of the peaks and troughs is how you measure the frequency. the distance between these is the wave length.
