The molar specific heat constant pressure of an ideal gas is 7R/2. The ratio of specific heat at constant pressure to that at constant volume is?

The heat supplied to the gas at constant volume is (where m = Mass of gas, C_v = Specific heat at constant volume, C_p = Specific heat at constant pressure, T₂ - T₁ = Rise in temperature and R = Gas constant)

A

mR (T₂ - T₁)

B

mC_v (T₂ - T₁)

C

mC_p (T₂ - T₁)

D

None of the above

What is the ratio of the molar heat at constant pressure to the molar heat at constant volume for a noble gas?

A

1.5

B

1.67

C

1.73

D

1.37

Under standard temperature (T) and pressure (P) conditions, 128 g of an ideal gas molecule A occupies a volume of 1 L. The gas molecule A obeys the relationship RT = 0.25 PV. R and V are universal gas constant and ideal gas volume, respectively. The molecule A is

A

CO₂

B

H₂

C

N₂

D

O₂

Only if the calculated molar mass is higher than the actual molar mass of the solute, the calculated molar mass is considered to be abnormal molar mass.

A

True

B

False

Group I shows different heat addition processes in power cycles. Likewise, Group II shows different heat removal processes. Group III lists power cycles. Match items from Groups I, II and III. Group I Group II Group III P. Pressure constant S. Pressure constant 1. Rankine cycle Q. Volume constant T. Volume constant 2. Otto cycle R. Temperature constant U. Temperature constant 3. Carnot cycle 4. Diesel cycle 5. Brayton cycle

A

P – S – 5, R – U – 3, P – S – 1, Q – T - 2

B

P – S – 1, R – U – 3, P – S – 4, P – T - 2

C

R – T – 3, P – S – 1, P – T – 4, Q – S - 5

D

P – T – 4, R – S – 3, P – S – 1, P – S - 5

For the gas absorption, the height of a transfer unit, based on the gas phase is given by (G: superficial molar gas velocity, L: superficial molar liquid velocity, FG:mass transfer co-efficient, mols/m² , a: in-terfacial area per unit volume of tower)

A

F/(FG.a)

B

FG/(G.a)

C

(G.a)/FG

D

L/(FG.G)

For the gas absorption, the height of a transfer unit, based on the gas phase is given by (G: superficial molar gas velocity, L: superficial molar liquid velocity, F_G: mass transfer co-efficient, mols/m², a: in-terfacial area per unit volume of tower)

A

$$\frac{{\text{G}}}{{{{\text{F}}_{\text{G}}}.{\text{a}}}}$$

B

$$\frac{{{{\text{F}}_{\text{G}}}}}{{{\text{G}}{\text{.a}}}}$$

C

$$\frac{{{\text{G}}{\text{.a}}}}{{{{\text{F}}_{\text{G}}}}}$$

D

$$\frac{{\text{L}}}{{{{\text{F}}_{\text{G}}}.{\text{G}}}}$$

For 5 moles of an ideal gas, Condition I: Pressure = 1 atm, Volume = 2 L, Temperature = 27 Degree Celsius Condition II: Pressure = P atm, Volume = V L, Temperature = T K. 5. If The Pressure and Volume in the II condition are 2 atm and 4 L, what is the temperature (T) of the gas?

A

300 K

B

600 K

C

900 K

D

1200 K

For an ideal gas, the specific molar volume of the gas is doubled then the pressure would be (Other parameters are same)

A

Same as before

B

Double

C

Half

D

None of the mentioned

Consider the following statement: 1) In an ideal gas, there are no intermolecular forces of attraction and repulsion. 2) At very low pressure, all gases and vapours approach ideal gas behaviour. 3) Enthalpy of an ideal gas depends only on temperature. Which of the above statements are correct?

A

1, 2 and 3

B

1 and 2 only

C

1 and 3 only

D

2 and 3 only

The molar specific heat constant pressure of an ideal gas is 7R/2. The ratio of specific heat at constant pressure to that at constant volume is?

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