To make an amendment to the Articles of Confederation all 13 states would have to unanimously agree to the proposal to amend it.
However if even one state is opposed to abolishing slavery country wide, it cannot be done. so therefore it is extremely unlikely it could solve the problem. This was one of the articles of Confederations major flaws
Second Great Awakening, Protestant religious revival in the United States from about 1795 to 1835. Many churches experienced a great increase in membership