# Enthalpy 1 (Worksheets)


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Work in groups on these problems. You should try to answer the questions without referring to your textbook. If you get stuck, try asking another group for help.

## Q1

Using bond energies, calculate the $$\Delta H_{rxn}$$ for each of the following:

1. $$2H_{2\,(g)} + O_{2\,(g)} \rightarrow 2H_2O_{(l)}$$
2. $$CH_{4\,(g)} + 2O_{2\,(g)} \rightarrow CO_{2\,(g)} + 2H_2O_{(l)}$$

Bond type Bond Energy, kJ/mol Bond type Bond Energy, kJ/mol
$$H - H$$ 436 $$C - O$$ 358
$$O - O$$ 146 $$C = O$$ 799
$$O = O$$ 498 $$C - H$$ 413
$$O - H$$ 463

## Contributors and Attributions

Enthalpy 1 (Worksheets) is shared under a not declared license and was authored, remixed, and/or curated by Mark Draganjac.