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A 0.44 m³ well-insulated tank contains nitrogen at 100 kPa and 30 deg C. Heat is added until the pressure is 150 kPa. What is the heat transfer (kJ)?

A 0.44 m³ well-insulated tank contains nitrogen at 100 kPa and 30 deg C. Heat is added until the pressure is 150 kPa. What is the heat transfer (kJ)?

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A 0.44 m3 well-insulated tank contains nitrogen at 100 kPa and 30 deg C. Heat is added until the pressure is 150 kPa. What is the heat transfer (kJ)? Report your answer to 2 decimal places.
Transcribed Image Text:A 0.44 m3 well-insulated tank contains nitrogen at 100 kPa and 30 deg C. Heat is added until the pressure is 150 kPa. What is the heat transfer (kJ)? Report your answer to 2 decimal places.
Expert Solution
Step 1

Since the tank is insulated so the process will be isothermal and the temperature of the gas will remain constant throughout the process.

Apply first law of thermodynamics

∆U=Q+W                   ⋯(1)

where ∆U is the change in internal energy, Q and W are the heat and work done respectively.

Internal energy depends on the temperature so the change in internal energy would be zero if the temperature is constant in an isothermal process. So ∆U=0, so the equation (1) becomes

∆U=Q+W0=Q+WQ=-W                     ⋯(2)

 

 

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