Amout of energy needed to warm air

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To calculate the energy required to heat air from 20 °C to 100 °C in a volume of 1680 cm³, the specific heat of dry air (1.0 kJ/kg-K) and the density of dry air (0.0013 g/cm³) are used. The total mass of the air in this volume is approximately 2.2 grams or 0.0022 kg. The energy needed for an 80 °C increase is calculated using the formula E = specific heat * mass * temperature change. This results in an energy requirement of 0.18 kJ or 180 J. The discussion highlights the importance of using correct constants for accurate calculations.
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Hi,

How do I calculate the amount of energy needed to warm air from 20 °C to 100 °C in a constant volume (1680 cm3)?

Thank you.
 
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The specific heat of dry air is about 1.0 kJ/kg-K, and the density of dry air is .0013 g/cm^3, so the air in 1680 cm^3 will weigh 2.2 g or 2.2E-3 kg. So to heat it up 80 C will take:

E = 1.0 kJ/kg-K * 2.2E-3 kg * 80 K = 0.18 kJ = 180J.

Here's a good source for some of these constants.
 
Thank you!
 

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