A solid sample of copper, Cu(s), is placed in a test tube containing a solution of nitric acid, HNO3(aq). When the substances are mixed the solution turns bluish-green, a brown gas is produced and the temperature of the test tube is observed to increase.
What are the signs of Hsys, Ssys, Gsys, Suniv.
As the temperature increases, will the reaction become more or less spontaneous?