A piston-cylinder device contains an ideal gas of nitrogen. At the initial state, the volume is V1= 1.00 m3, the pressure is p1= 400.00 kPa, the temperature is T1= 300.00 K. An electric heater within the device is turned on for a time of Δt = 5.00 min. The current is I = 3.00 A, and the source voltage is V = 120.00 V. During the heating process, the gas expands, and a heat loss of Qout = 2.80 kJ occurs.  The gas constant is R = 0.297 kPa·m3/(kg·K), and the room temperature specific heat at constant pressure is cp =1.039 kJ/(kg·K).  Calculate the electrical work done on the gas, Wele__________ (kJ)

Elements Of Electromagnetics
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A piston-cylinder device contains an ideal gas of nitrogen. At the initial state, the volume is V1= 1.00 m3, the pressure is p1= 400.00 kPa, the temperature is T1= 300.00 K. An electric heater within the device is turned on for a time of Δt = 5.00 min. The current is I = 3.00 A, and the source voltage is V = 120.00 V. During the heating process, the gas expands, and a heat loss of Qout = 2.80 kJ occurs.  The gas constant is R = 0.297 kPa·m3/(kg·K), and the room temperature specific heat at constant pressure is cp =1.039 kJ/(kg·K). 

Calculate the electrical work done on the gas, Wele__________ (kJ)

 

A piston-cylinder device contains an ideal gas of nitrogen. At the initial state, the volume is V₁= 1.00 m³, the pressure is p₁= 400.00 kPa, the
temperature is T₁ = 300.00 K. An electric heater within the device is turned on for a time of At = 5.00 min. The current is I = 3.00 A, and the source
voltage is V = 120.00 V. During the heating process, the gas expands, and a heat loss of Qout = 2.80 kJ occurs. The gas constant is R = 0.297
kPa-m³/(kg-K), and the room temperature specific heat at constant pressure is cp =1.039 kJ/(kg-K).
Calculate the electrical work done on the gas, Wele
Gas
ww
(kJ)
Transcribed Image Text:A piston-cylinder device contains an ideal gas of nitrogen. At the initial state, the volume is V₁= 1.00 m³, the pressure is p₁= 400.00 kPa, the temperature is T₁ = 300.00 K. An electric heater within the device is turned on for a time of At = 5.00 min. The current is I = 3.00 A, and the source voltage is V = 120.00 V. During the heating process, the gas expands, and a heat loss of Qout = 2.80 kJ occurs. The gas constant is R = 0.297 kPa-m³/(kg-K), and the room temperature specific heat at constant pressure is cp =1.039 kJ/(kg-K). Calculate the electrical work done on the gas, Wele Gas ww (kJ)
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