The decomposition of calcium carbonate, CaCO3(s) > CaO(s)+CO2(g), has the following values for free energy and enthalpy at 25.0°C /\G=130.5 kJ/mol
/\H=178.3 kJ/mol

What is the entropy of the reaction?
Use /\G=/\H-T/\S

A. -160.3J/(mol. K)
B. -47.8J/(mol. k)
C. 160.3 J/(mol. k
D. 1912 j/(mol. k

6) (a) calculate the absorbance of the solution if its concentration is 0.0278 m and its molar extinction coefficient is 35.9 l/(mol cm). the depth of the cell is 5 mm. (b) what is the %t? (7) calculate the absorbance of the solution if the transmitted light intensity is 70% of the initial light beam intensity