The work done during the expansion of a gas from a volume of 4 dm³ to 6 dm³
The work done during the expansion of a gas from a volume of 4 dm³ to 6 dm³ against a constant external pressure of 3 atm is (1atm = 101.32 J)
Options
(a) -6 […]
Thermodynamics
IF the bond energies of H – H , Br – Br and H – Br are 433 , 192 and 364 kJ mol⁻¹
IF the bond energies of H – H , Br – Br and H – Br are 433 , 192 and 364 kJ mol⁻¹ respectively, the ΔH° for the reaction H₂(g) + Br₂(g) → 2HBr(g) […]
The mole heat capacity of water at constant pressure, C, is 75 J K⁻¹mol⁻¹.
The mole heat capacity of water at constant pressure, C, is 75 J K⁻¹mol⁻¹. When 1.0 kJ of heat is supplied to 100g of water which is free to expand, the increases in temperature of […]
For which one of the following equations is ΔH⁰react equal to ΔH°f
For which one of the following equations is ΔH⁰react equal to ΔH°f for the product
Options
(a) N₂(g) + O₃(g) → N₂O₃(g) (b) CH₄(g) + 2Cl₂(g) → CH₂Cl₂(l) + 2HCl(g) (c) Xe(g) + 2F₂(g) […]
What is the entropy change (in J K⁻¹ mol⁻¹) when one mole of ice is converted
What is the entropy change (in J K⁻¹ mol⁻¹) when one mole of ice is converted into water at 0⁰C? (The enthalpy change for the conversion of ice to liquid water is 6.0 kJ mol⁻¹ […]
Unit of entropy is
Unit of entropy is
Options
(a) JK⁻¹ mol⁻¹ (b) J mol⁻¹ (c) J⁻¹ K⁻¹ mol⁻¹ (d) JK mol⁻¹
Correct Answer:
JK⁻¹ mol⁻¹
Explanation:
Entropy change (ΔS) is given by ΔS = Δq(r)/T, therefore , […]
Heat of combustion ΔH for C(s) , H₂(g)and CH₄(g) are -94, -68 and -213 kcal/mol.
Heat of combustion ΔH for C(s) , H₂(g)and CH₄(g) are -94, -68 and -213 kcal/mol. Then ΔH for C(s) + 2H₂(g) → CH₄(g)is
Options
(a) -17 kcal (b) -111kcal (c) -170 kcal (d) -85 […]
In a closed insulated container a liquid is stirred with a paddle to increase
In a closed insulated container a liquid is stirred with a paddle to increase the temperature which of the following is true
Options
(a) ΔE = w ≠ 0, q = 0 (b) ΔE […]
Enthalpy of CH₄ + ¹/² O₂ → CH₃OH is negative. If enthalpy of combustion of CH₄
Enthalpy of CH₄ + ¹/² O₂ → CH₃OH is negative. If enthalpy of combustion of CH₄ and CH₃OH are x and y respectively. Then which relation is correct
Options
(a) x > y (b) […]
When 1 mol of gas is heated at constant volume,temperature is raised
When 1 mol of gas is heated at constant volume, temperature is raised from 298 to 308 K. Heat supplied to the gas is 500J. Then which statement is correct
Options
(a) q = […]