Zadania z chemii IB HL

trans-But-2-ene reacts with hydrogen in the presence of a nickel catalyst to form butane. $\ce{C4H8(g) + H2(g) -> C4H10(g)}$ (i) Calculate, in kJ, the enthalpy change of this reaction from the bond enthalpies in section 12 of the data booklet. (ii) Calculate,…

The table shows standard enthalpies of combustion. Substance $\Delta H_\mathrm{c}^\ominus$ / $\mathrm{kJ\,mol^{-1}}$ $\ce{C4H10(g)}$ −2878 $\ce{C3H6(g)}$ −2058 $\ce{CH4(g)}$ −891 Which expression gives the enthalpy change, in $\mathrm{kJ\,mol^{-1}}$, of the…

(i) Calculate the enthalpy change, $\Delta H$, for the overall synthesis of propyl ethanoate from propane and ethane shown above. Use section 12 of the data booklet. (ii) Two students each calculated the enthalpy change for the reaction between propan-1-ol and…

What is the enthalpy change, in $\mathrm{kJ\,mol^{-1}}$, for the formation of methanol from carbon monoxide and hydrogen? $\ce{CO(g) + 2H2(g) -> CH3OH(l)}$ Substance $\Delta H_\mathrm{c}^\ominus$ / $\mathrm{kJ\,mol^{-1}}$ $\ce{CO(g)}$ −283 $\ce{H2(g)}$ −286…

Pentadecane can be cracked into smaller molecules. Consider the reaction: $\ce{C15H32(g) -> 3C4H8(g) + C3H8(g)}$ where $\ce{C4H8}$ is but-1-ene. (i) Use the bond enthalpies in section 12 of the data booklet to determine $\Delta H^\ominus$ for this reaction.…