List of top Chemistry Questions on Enthalpy

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): The enthalpy of any strong acid by a strong base is practically the same ($-13.7~kCal~mol^{-1}$). Reason (R): Every neutralization reaction involves the combination of $H^{+}$ and $OH^{-}$ ions to form water.}
Which of the following molecules has the highest standard enthalpy change of fusion (\( \Delta_{fus}H^\circ \)) (in kJ mol\(^{-1}\))?
Which of the following is an extensive property?
Which of the following bond enthalpies is the least: \[ C = C, C = O, C \equiv N, C = N \]
The enthalpy of combustion of methane is \(-890 \, \text{kJ/mol}\). What is the enthalpy change when 8 g of methane is burned?
(Molar mass = 16 g/mol)