Question

standard enthalpy are usua lly measured at which temperature?? Ans is 273k, 373k ,298k, 250k???

Answer 1

Generally, Standard enthalpy is measured at room temperature,

which is 25°C or 273 + 25 = 298 Kelvin

Hope it helps

Answer 2

Standard enthalpy is usually measured at 298 k or 25°C

• Standard enthalpy of formation is the heat released in the formation of 1 mole of the compound by its constituent atom or molecule
• Standard state or room temperature should be maintained to carry out standard enthalpy.
• The standard values are the most stable ones ie 1 atm pressure, 298K, and 1M concentration.
• As enthalpy of the substance changes with temperature. it increases with an increase in temperature.
• Standard enthalpy maintains a steady state at 298K
• It is also called NTP ie normal temperature and pressure.
• It is used for the calculations of ideal gases so that liquid and gases be pure.

Hence, standard enthalpy is usually measured at 298 k or 25°C. the correct option is (c).

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