Decades: 280s BC 270s BC 260s BC 250s BC 240s BC - 230s BC - 220s BC 210s BC 200s BC 190s BC 180s BC
Years: 239 BC 238 BC 237 BC 236 BC 235 BC 234 BC 233 BC 232 BC 231 BC 230 BC
... were present gives its enthalpy change of reaction.
There are many forms of calorimeters
differential scanning calorimeter (DSC)
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