The enthalpy change when x g of phenol dissolves in y g of $CHC{l}_3$ is given below at a certain temperature.  

X	Y	$\Delta H$ (kcal)
0.470	120	-0.02
1.410	140	-0.03

What is magnitude of enthalpy of dilution per mole of phenol, when the second solution is diluted to the concentration of the first by addition of $CHC{l}_3.$ (give value to nearest integer in Kcal/mol )