Enthalpy changes depend on the temperature and pressure under which a process occurs. However, the enthalpy change will be different at different pressures. Therefore, chemists often deal with standard enthalpy of reaction AHºf The temperature and pressure conditions for standard enthalpy are 2.5 °C and 10 kPa 25 °C and 100 kPa 25 K and 100 Pa 0 °C and 100 kPa O

Physical Chemistry
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Author:Ball, David W. (david Warren), BAER, Tomas
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Chapter3: The Second And Third Laws Of Thermodynamics
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Enthalpy changes depend on the temperature and pressure under which a process
occurs. However, the enthalpy change will be different at different pressures.
Therefore, chemists often deal with standard enthalpy of reaction AH,
The temperature and pressure conditions for standard enthalpy are
2.5 °C and 10 kPa
25 °C and 100 kPa
25 K and 100 Pal
0 °C and 100 kPal
O 0 °C and
Transcribed Image Text:Enthalpy changes depend on the temperature and pressure under which a process occurs. However, the enthalpy change will be different at different pressures. Therefore, chemists often deal with standard enthalpy of reaction AH, The temperature and pressure conditions for standard enthalpy are 2.5 °C and 10 kPa 25 °C and 100 kPa 25 K and 100 Pal 0 °C and 100 kPal O 0 °C and
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