What is the overall enthalpy change dhrxn for the system?
-1,300 kj
-300 kj
300 kj
1,300 kj

Your answer is 300 kJ

hope this helps! (:

each chemical family is represented as a group or column on the periodic table. based on chemical properties, there are 6 types of chemical families. group 1 represents alkali metals, group 2 represents alkaline earth metals, groups 3 to 12 represent transition metals, groups 13 to 16 represent non-metals and other metals, group 17 represents halogens and group 18 represents noble gases.