Advertisements
Advertisements
प्रश्न
In a petrol engine, (internal combustion engine) air at atmospheric pressure and temperature of 20°C is compressed in the cylinder by the piston to `1/8` of its original volume. Calculate the temperature of the compressed air. (For air γ = 1.4)
Advertisements
उत्तर
T1 = 20°C = 20 + 273 = 293 K
V1 = 1 m3
V2 = `1/8` V1m3
γ = 1.4
From equation of adiabatic process
TVγ − 1 = constant
`"T"_1"V"_1^(γ - 1) = "T"_2"V"_2^(γ - 1)`
T2 = `("V"_1/"V"_2)^(γ - 1)"T"_1`
T2 = `[1/((1/8))]^(1.4 - 1) xx 293`
= (8)0.4 × 293
= 673.1 K
= 673.1 − 273
T2 ≅ 400°C
APPEARS IN
संबंधित प्रश्न
A thermodynamic system is taken from an original state to an intermediate state by the linear process shown in Figure
Its volume is then reduced to the original value from E to F by an isobaric process. Calculate the total work done by the gas from D to E to F
Answer in brief.
Why should a Carnot cycle have two isothermal two adiabatic processes?
An ideal gas of volume 2 L is adiabatically compressed to (1/10)th of its initial volume. Its initial pressure is 1.01 x 105 Pa, calculate the final pressure. (Given 𝛾 = 1.4)
Explain graphically (i) positive work with varying pressure, (ii) negative work with varying pressure, and (iii) positive work at constant pressure.
When you exercise in the morning, by considering your body as a thermodynamic system, which of the following is true?
Draw the PV diagram for the adiabatic process.
A monoatomic gas of pressure p having volume V expands isothermally to a volume 2V and then adiabatically to a volume 16V. The final pressure of the gas is ____________.
`("ratio of specific heats" = 5/3)`
Ideal gas for which 'ϒ' = 1.5 is suddenly compressed to `1/4`th of its initial volume. The ratio of 4 the final pressure to the initial pressure is ______.
`(ϒ = "C"_"p"/"C"_"v")`
Which of the following processes is reversible?
Consider P-V diagram for an ideal gas shown in figure.
Out of the following diagrams (figure), which represents the T-P diagram?
 (i) |
 (ii) |
 (iii) |
 (iv) |
