Question

For which reaction will K_p = K_c?

		C(s) + O2(g) ⇌  CO2(g)
		2 H2O(l) ⇌ 2 H2(g) + O2(g)
		CaCO3(s) ⇌  CaO(s) + CO2(g)
		H2CO3(s) ⇌ H2O(l) + CO2(g)
		2 HgO(s) ⇌ Hg(l) + O2(g)

Answer 1

The relation between the equilibrium constant with respect to concentration in molarity (mol/L), (Kc) and the equilibrium constant with respect to partial pressure in atmospheres Kp ) is as follows: An Here, R is the universal gas constant and its value is 0.08206 T is the temperature in mol K K. and дп is the sum of the gaseous product's stoichiometric coefficients minus the sum of the gaseous reactant's stoichiometric coefficients in the balanced chemical reaction The balanced chemical reaction is as follows: C(s) + O2(g) 근 CO2(g) Here, C, O, are the reactants, CO,is the product 1, 1, and 1 are the stoichiometric coefficients of C, O,, and CO2 respectively.

The value of Δη is as follows sum ofgaseous〉 products (sum of gaseous reactants Here, stoichiometric coefficient of C (carbon) is not included because it is in solid state not in gaseous state. An = 1(for CO2)-1(for O2) Calculate Kp as shown below: K, Ke(RT) Kee, since. a r 1 Therefore, for the given reaction, Kp - Kc

The balanced chemical reaction is as follows: 2H,0φ 근 2 H, (g) + O2 (g) Here, H,O is the reactant, H, ,O, are the products 2, 2, and 1 are the stoichiometric coefficients of H2O, H2, and O, respectively. The value of Δη is as follows: sum of gaseous (sum of gaseous products reactants An=L2(for H. ) +1(for 02)」 Here, stoichiometric coefficient ofH2O (water) is not included because it is in liquid state not in gaseous state. Calculate Kp as shown below: Kp Kc (RT) K, = Kc (RT) An 3 Therefore, for the given reaction, Kp-Kc (RT)

The balanced chemical reaction is as follows: Here, CaCO, is the reactant, CaO,CO2 are the products. i, i, and i are the stoichiometric coefficients of CaCO, , CaO , and CO, respectively The value of An is as follows: sum of gaseous sum of gaseous products reactants Here, stoichiometric coefficients of CaCO, and CaO are not included because they are in solid state not in gaseous state. An-1(for CO2)

Calculate K, as shown below: An K Kc(RT) Kp -Kc (RT) Therefore, for the given reaction, Kp Kc (RT) The balanced chemical reaction is as follows: H,CO,(s) 근 H20() + CO2 (g) Here, H,CO,is the reactant, H,O,CO are the products 1, 1, and 1 are the stoichiometric coefficients of H2CO, H2O, and CO, respectively. The value of Δη is as follows: sum ol gaseous products sum ol gaseous reactants Here, stoichiometric coefficients of H,CO, andH,O are not included because H CO, is in solid state and H,O is in liquid state An 1(for Co2)

Calculate Kp as shown below: Kp Kc (RT) Kp Kc (RT) Kp -Kc(RT) An Therefore, for the given reaction, Kp Kc (RT) The balanced chemical reaction is as follows 2 HigO(s) 근 Hig(1) + 02(g) Here, HgO is the reactant, Hg ,O2 are the products.

2, 1, and 1 are the stoichiometric coefficients of HgO, Hg, and O2 respectively. The value of Δη is as follows: sum of gaseous (sum of gaseous products reactants Here, stoichiometric coefficients of HgO and Hg are not included because HgO is in solid state and Hg is in liquid state. An 1(for O2) Calculate Kp as shown below: An Kp Kc (RT) Kp -Kc (RT) Therefore, for the given reaction, Kp Kc (RT) Therefore, among the given balanced chemical reactions, the following reaction will have C(s) O2(g)CO2 (g)