Heating gases at constant pressure or constant volume?

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SUMMARY

Heating a gas by 10 degrees Celsius requires understanding the specific heat capacities at constant pressure and constant volume. The specific heat capacity at constant volume (Cv) is lower than that at constant pressure (Cp) for an ideal gas, meaning less heat energy is needed to achieve the same temperature increase when heating at constant volume. Therefore, heating a gas at constant volume is more efficient in terms of energy usage compared to heating at constant pressure.

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  • Understanding of specific heat capacity concepts
  • Knowledge of ideal gas laws
  • Familiarity with thermodynamic principles
  • Basic mathematical skills for comparing heat capacities
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  • Research the specific heat capacity formulas for ideal gases
  • Study the differences between constant pressure and constant volume processes
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if i was to heat a gas [any gas] by 10 degrees celsius, using the smallest amount of heat energy, would i be better off heating the gas at constant pressure or constant volume. i think constant pressure, however i don't know how to justify my answer...:confused:

cheers
 
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You'll want to look for the specific heat capacity of an ideal gas at constant volume and at constant pressure, and compare them. The smaller heat capacity means it takes less heat to raise the temperature of the gas by a chosen amount.
 
Alternatively, you could think about extra energy being lost or gained, for the cases where pressure is constant or volume is constant.
 

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