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Standard XII

Chemistry

Heat Capacity

The specific ...

Question

The specific heat of air at constant pressure is $1.005 k J / k g K$ and the specific heat of air at constant volume is $0.718 k J / k g K$ .Find the specific gas constant.

0.287 K J / k g K

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0.21 k J / k g K

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0.34 k J / k g K

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0.19 k J / k g K

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Solution

The correct option is A $0.287 K J / k g K$
Specific gas constant = Specific heat at constant pressure - Specific heat at constant volume
= 1.005 - 0.718
= 0.287 KJ/kgK

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Similar questions

Q. Air is flowing steadily in an insulated duct. The pressure and specific volume measurements of the air at two station A and B are

	Station A	Station B
Pressure	100 kPa	98 kPa
Specific volume	0.81 $m^{3} / k g$	0.97 $m^{3} / k g$

Take

C_{p} = 1.005 k J / k g K; C_{v} = 0.718 k J / k g K .

What is direction of air flow in duct?

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c_{p} = 1.005 k J / k g K, c_{v} = 0.718 k J / k g K

. and

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In an experimaental set-up, air flows between two stations $P$ and $Q$ adiabatically. The direction of flow depdns on the pressure and temperature conditions maintained at $P$ and $Q$ . The conditions at $P$ are $150 k P a$ and $35 K$ . The temperature at station $Q$ is $300 K$ . The following are the properties and relations pertaining to air:
Specific heat at constant pressure,
$c_{p} = 1.005 k G / k g K;$
Specific heat at constnat volume,
$c_{v} = 0.718 k J / k g K;$
Characteristic gas constnat,
$R = 0.287 k J / k g K$
Enthalpy, $h = c_{p} T .$
Internal energy, $u = c_{v} T .$

If the pressure at station $Q$ is $50 k P a,$ the change in entropy $(s_{Q} - s_{P})$ in $k J / k g K$ is

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The specific heat of air at constant pressure is 1.005 kJ/kg K and the specific heat of air at constant volume is 0.718 kJ/kg K .Find the specific gas constant.

The correct option is A 0.287 KJ/kgKSpecific gas constant = Specific heat at constant pressure - Specific heat at constant volume = 1.005 - 0.718 = 0.287 KJ/kgK

The specific heat of air at constant pressure is $1.005 k J / k g K$ and the specific heat of air at constant volume is $0.718 k J / k g K$ .Find the specific gas constant.

The correct option is A $0.287 K J / k g K$
Specific gas constant = Specific heat at constant pressure - Specific heat at constant volume
= 1.005 - 0.718
= 0.287 KJ/kgK