Part 3 Thermo

For an ideal diatomic gas:

• C_v = 20.8 J/mol.K

• C_v = 28.5 J/mol.K

• C_v = 20.8 J/K

• C_v = 25.5 J/K

A diatomic gas, compressed isobarically, did 42 J of work. Which was the amount of heat given to the gas during such process?

• 147 J

• 137 J

• 127 J

• 117 J

• 9/7

• 7/5

• 5/3

• 5/7

. 1.80 mol of an ideal gas is taken from a volume of 3.00 m³ to a volume of 1.50 m³ via an isothermal compression at 30^oC. How much energy is transferred as heat during the compression?

• – 3140 J

• – 3.14 J

• – 314 J

• – 31.4 J

The adiabatic relation between volume and temperature of an ideal gas is:

• V^γ-1 T = constant

• V^1+γ T^γ = constant

• V^1-γ T^γ+1 = constant

• V^1-γ T^γ-1 = constant

Which of the following statements is correct

• C_p can never be less than C_v

• C_p  C_v in some specific cases

• C_p may be less than C_v depending on the gas

• C_p may be equal to or less than C_v

The work done by an adiabatic expansion is written as

• W = 0

• 
• 
• 

A monatomic gas is suddenly compressed to  of its initial volume adiabatically. The ratio of its final pressure to the initial pressure is

• 32

• 8

• 1/32

• 1/8

One mole of a monoatomic ideal gas is mixed with one mole of a diatomic ideal gas. The molar specific heat of the mixture at constant volume is

• R

• 2R

• 0.5R

• 4R

A gaseous mixture consists of 16g of Helium and 16g of Oxygen. The ratio Cp/Cv  of the mixture is:

• 1.4

• 1.54

• 1.59

• 1.62