Table 7.

Results from fourth, third, and second order equations for the emf of standard cells of the saturated cadmium sulfate type as a function of temperature (to 0.1 μV)

Temperature, °C	Electromotive force, V			Δ in ΔG,				Δ in ΔG,
				ΔE, μV		J mol−1		cal mol−1
	4th order	3d order	2d order	4–3	4–2	4–3	4–2	4–3	4–3
0	1.0189968	1.0189967	1.0190260	0.1	−29.2	0.02	−5.63	0.005	−1.35
3	1.0190112	1.0190112	1.0190133	0	−2.1	0	−0.41	0	−0.10
5	1.0190061	1.0190062	1.0189959	−0.1	10.2	−0.02	1.97	−0.005	0.47
10	1.0189455	1.0189455	1.0189211	0	24.4	0	4.71	0	1.13
15	1.0188224	1.0188224	1.0188012	0	21.2	0	4.09	0	0.98
18	1.0187217	1.0187216	1.0187084	0.1	13.3	0.02	2.57	0.005	0.61
20	1.0186443	1.0186442	1.0186373	0.1	7.0	.02	1.35	.005	.32
25	1.0184186	1.0184185	1.0184284	0.1	−9.8	.02	−1.89	.005	−0.45
28	1.0182635	1.0182634	1.0182816	0.1	−18.1	.02	−3.49	.005	−0.83
30	1.0181529	1.0181528	1.0181748	0.1	−21.9	.02	−4.23	.005	−1.01
35	1.0178547	1.0178547	1.0178764	0	−21.7	.02	−4.19	.005	−1.00
40	1.0175317	1.0175316	1.0175334	0.1	−1.7	.02	−0.33	.005	−0.08
43.6a	1.0172880	1.0172878	1.0172587	0.2	29.3	.04	5.65	.01	1.35

^aExtrapolated values.