Given the following at 25°C, calculate ΔH_f for HCN(g) (in kJ/mol) at 25°C.

Using the table below, estimate δh for the "water splitting reaction": H₂O(g) → H₂(g) + 12 O₂(g).

Which answer best describes the transfer of heat that occurs when 1.20 mol of H₂ reacts?

Which answer best describes the transfer of heat that occurs when 1.40 mol of H₂ reacts?

In many ways, hydrogen as a biofuel compares very favorably to ethanol and other fuels.

Which answer best describes the transfer of heat that occurs when 1.30 mol of H₂ reacts?

What is the change in enthalpy associated with the combustion of 530 g of methane (CH₄)?