<Tr> <Td> Surface tension </Td> <Td> 39.8 dyn / cm at 0 ° C 36.8 dyn / cm at 20 ° C 26.1 dyn / cm at 100 ° C </Td> </Tr> <Tr> <Td> Viscosity </Td> <Td> 0.853 mPa s at 0 ° C 0.620 mPa s at 25 ° C </Td> </Tr> <Table> <Tr> <Th_colspan="2"> Phase behavior </Th> </Tr> <Tr> <Td> Triple point </Td> <Td> 244.77 K (--23.38 ° C),? Pa </Td> </Tr> <Tr> <Td> Critical point </Td> <Td> 588 K (315 ° C), 5870 kPa </Td> </Tr> <Tr> <Td> Std enthalpy change of fusion, Δ H </Td> <Td> 9.7 kJ / mol </Td> </Tr> <Tr> <Td> Std entropy change of fusion, Δ S </Td> <Td> 39.6 J / (mol K) </Td> </Tr> <Tr> <Td> Std enthalpy change of vaporization, Δ H </Td> <Td> 38.3 kJ / mol </Td> </Tr> <Tr> <Td> Std entropy change of vaporization, Δ S </Td> <Td> 128.36 J / (mol K) </Td> </Tr> <Tr> <Th_colspan="2"> Solid properties </Th> </Tr> <Tr> <Td> Std enthalpy change of formation, Δ H </Td> <Td>? kJ / mol </Td> </Tr> <Tr> <Td> Standard molar entropy, S </Td> <Td>? J / (mol K) </Td> </Tr> <Tr> <Td> Heat capacity, c </Td> <Td>? J / (mol K) </Td> </Tr> <Tr> <Th_colspan="2"> Liquid properties </Th> </Tr> <Tr> <Td> Std enthalpy change of formation, Δ H </Td> <Td>--113 kJ / mol </Td> </Tr> <Tr> <Td> Standard molar entropy, S </Td> <Td> 171.75 J / (mol K) </Td> </Tr> <Tr> <Td> Enthalpy of combustion, Δ H </Td> <Td>--709 kJ / mol </Td> </Tr> <Tr> <Td> Heat capacity, c </Td> <Td> 105.98 J / (mol K) </Td> </Tr> <Tr> <Th_colspan="2"> Gas properties </Th> </Tr> <Tr> <Td> Std enthalpy change of formation, Δ H </Td> <Td>--81 kJ / mol </Td> </Tr> <Tr> <Td> Standard molar entropy, S </Td> <Td>? J / (mol K) </Td> </Tr> <Tr> <Td> Heat capacity, c </Td> <Td> 57.3 J / (mol K) at 25 ° C </Td> </Tr> </Table> <Tr> <Th_colspan="2"> Phase behavior </Th> </Tr>

What is the standard enthalpy of formation of nitromethane in kj/mol