Question
Define Semipermeable membrane
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| Bond | $\text{C - H}$ | $\text{C - H}$ | $\text{C - H}$ |
| $\ce{\Delta H^0 / KJ\ mol ^{-1}}$ | $414$ | $243$ | $431$ |
| Bond | $C - H$ | $O = O$ | $C = O$ | $O = H$ |
| $\Delta H^0 / kJ mol ^{-1}$ | 414 | 499 | 745 | 464 |