Heat of neutralisation of a polybasic acid by strong base is -54.8 kcal mol^(-1). What is basicity of the acid?

Heat of neutralisation of a polybasic acid by strong base is -54.8 kca

1.	Heat of neutralisation of a polybasic acid by strong base is -54.8 kcal mol^(-1). What is basicity of the acid?
Answer» SOLUTION :`-54.8= -13.7 X RARR x= 4`