Chemistry

Chemistry

Problem

The combustion of hydrogen gas to form liquid water has ΔH=−286 kJ mol−1\Delta H = -286\,\text{kJ mol}^{-1} (per mole of H2\text{H}_2 consumed). Calculate the minimum mass of H2\text{H}_2 (in grams) that must be burned to release 1.72×103 kJ1.72\times10^{3}\,\text{kJ} of heat.

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