Question

According to Le Chatelier principle, an increase in the temperature of the following reaction will:

$N_2+O_2\rightleftharpoons 2NO-43200$ cal.

Answer 1

$N_2+O_2\rightleftharpoons 2NO-43200cal$

So the above forward reaction is endothermic. If we increase the temperature of the following reaction, according to Le Chatelier's principle increase in temperature, i.e. addition of heat will favour the endothermic direction as this reduces the amount of heat produced in the system. In this case forward reaction will be driven.