Q.
A. The standard enthalpy of an overall reaction is the sum of the enthalpy chages in individual reaction
B. enthalpy of formation of compoud is same as the enthalpy of decomposition of the compound into constituent elements, but with opposite sign
C. at constant temperature the pressure of a gas in inversely proportional to its volume.
D. the mass of a gas dissolved per lit of a solvent is proportional to the pressure of the gas in equilibrium with the solution
E. None of the above
Correct choice: A
Explanation: