Chemistry · 2021
JEE Main · 16 March 2021, Shift 2 · Q54
At 25^° C, 50 g of iron reacts with HCl to form FeCl_2. The evolved hydrogen gas expands against a constant pressure of 1 bar. The work done by the…
At $\displaystyle 25^{\circ} \mathrm{C}, 50 \mathrm{~g}$ of iron reacts with HCl to form $\displaystyle \mathrm{FeCl}_2$. The evolved hydrogen gas expands against a constant pressure of $\displaystyle 1$ bar. The work done by the gas during this expansion is
\_\_\_\_ J.
(Round off to the Nearest Integer).
[Given : $\displaystyle \mathrm{R}=8.314 \mathrm{~J} \mathrm{~mol}^{-1} \mathrm{~K}^{-1}$. Assume, hydrogen is an ideal gas]
[Atomic mass of Fe is $\displaystyle 55.85$ u ]
Official answer
2218
More from Chemical Thermodynamics
- For water at 100^° C and 1 bar, Δ_vap H-Δ_vap U= \ \ \ \ × 10^2 J mol^-1. (Round off to the Nearest Integer) [. Use:.R=8.31 J mol^-1 K^-1] [Assume…2021
- 0 g of NH_3 completely vapourises at -33.42^° C and 1 bar pressure and the enthalpy change in the process is 23.4 kJ mol^-1. The enthalpy change for…2022
- Consider the reaction 2 H_2 S( g)+3 O_2( g) → 2 H_2 O(l)+2 SO_2( g) The magnitude of enthalpy change for the reaction in kJ mol^-1 is ____. (Nearest…2026
- A sample of n-octane (1.14 g) was completely burnt in excess of oxygen in a bomb calorimeter, whose heat capacity is 5 kJ K^-1. As a result of…2025
- The gas phase reaction 2 A( g) ⇌ A_2( g) at 400 K has Δ G^°=+25.2 kJ mol^-1. The equilibrium constant K_C for this reaction is \ \ \ \ × 10^-2.…2021
- For the reaction A_(g) → B_(g), the value of the equilibrium constant at 300 K and 1 atm is equal to 100.0. The value of Δ_r G for the reaction at…2021
- One mole of an ideal monoatomic gas is subjected to changes as shown in the graph. The magnitude of the work done (by the system or on the system) is…2023
- 1 mole of ideal gas is allowed to expand reversibly and adiabatically from a temperature of 27^° C. The work done is 3 kJ mol^-1. The final…2023
JEE Main 2021 Chemistry question, with the answer from NTA’s final answer key. Where our answers come from.