<Tr> <Td> Ethanol </Td> <Td> 0150! 150 K (− 123 ° C) </Td> <Td> 6993429990000099999 ♠ 4.3 × 10 kPa </Td> </Tr> <Tr> <Td> Ethylene </Td> <Td> 0104.0! 104.0 K (− 169.2 ° C) </Td> <Td> 6999120000000000000 ♠ 0.12 kPa (0.0012 atm) </Td> </Tr> <Tr> <Td> Formic acid </Td> <Td> 0281.40! 281.40 K (8.25 ° C) </Td> <Td> 7000220000000000000 ♠ 2.2 kPa (0.022 atm) </Td> </Tr> <Tr> <Td> Helium - 4 (lambda point) </Td> <Td> 0002.18! 2.1768 K (− 270.9732 ° C) </Td> <Td> 7000500000000000000 ♠ 5.048 kPa (0.04982 atm) </Td> </Tr>

Explain why ice in liquid water at 0 degrees celsius is an example of physical equilibrium