Gibbs Energy and Spontaneity

JEE Main Chemistry · Chemical Thermodynamics · 13 questions, latest first

• Consider the following data for the reaction X_2( g)+Y_2( g) ⇌ 2 XY( g) at 600 K. The Δ_r G^ (in kJ mol^-1 ) for the reaction is:20265 April, Shift 2 · Q54
• At the transition temperature T, A ⇌ B and Δ G^0=105-35 log T where A and B are two states of substance X. The transition…20262 April, Shift 1 · Q75
• Let us consider a reversible reaction at temperature, T. In this reaction, both Δ H and Δ S were observed to have positive…20254 April, Shift 1 · Q53
• Which of the following graphs correctly represents the variation of thermodynamic properties of Haber's process?20252 April, Shift 2 · Q54
• Let us consider an endothermic reaction which is non-spontaneous at the freezing point of water. However, the reaction is…202524 January, Shift 1 · Q53
• Standard entropies of X_2, Y_2 and XY_5 are 70,50 and 110 J K^-1 mol^-1 respectively. The temperature in Kelvin at which the…202524 January, Shift 1 · Q72
• The effect of temperature on spontaneity of reactions are represented as: The incorrect combinations are:202523 January, Shift 2 · Q52
• The standard enthalpy and standard entropy of decomposition of N_2 O_4 to NO_2 are 55.0 kJ mol^-1 and 175.0 J / K / mol…202523 January, Shift 1 · Q71
• For the reaction at 298 K, 2 A+B → C. Δ H=400 kJ mol^-1 and Δ S=0.2 kJ mol^-1 K^-1. The reaction will become spontaneous above…20246 April, Shift 2 · Q83
• Which of the following is not correct?202429 January, Shift 1 · Q62
• For complete combustion of ethene, C_2 H_4( g)+3 O_2( g) → 2 CO_2( g)+2 H_2 O(l) the amount of heat produced as measured in bomb…20238 April, Shift 2 · Q83
• Consider the graph of Gibbs free energy G vs Extent of reaction. The number of statement/s from the following which are true with…20236 April, Shift 1 · Q86
• For independent processes at 300 K The number of non-spontaneous processes from the following is ____202324 January, Shift 1 · Q54