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1. For the reaction below, K_c = 0.154 at 2000 K.

2 CH₄(g) C₂H₂(g) + 3 H₂(g)

A 0.750 L equilibrium mixture at 2000 K contains 0.1000 mol each of CH₄(g) and H₂(g).What is the equilibrium concentration of C₂H₂(g)? Enter answer with 3 significant digits.

The equilibrium concentration of C₂H₂(g) is ______ mol L¹.

2. Calculate _rH, _rS, _rG, and K at 298.15 K for the reaction below.

	C(gr.)	+	12 N2(g)	+	52 H2(g)		CH3NH2(g)
fH at 298.15 K / kJ mol1	0		0		0		22.97
S at 298.15 K / J K1 mol1	5.74		191.61		130.68		243.4

(a) The standard enthalpy of reaction at 298.15 K is _rH = _____ kJ mol

(b) The standard entropy of reaction at 298.15 K is _rS = ______ J K¹ mol¹

(c) The standard Gibbs energy of reaction at 298.15 K is _rG = ____ kJ mol¹

(d) The value of the thermodynamic equilibrium constant at 298.15 K is K = _____