Emf‒temperature coefficient, μV K‒1						Entropy change, ΔS		Enthalpy change, ΔH
°C	Int	Abs48 & t48	Abs69 & t48	Abs69 & t68	σm (μV)	J K‒1 mol‒1	cal K‒1 mol‒1	(J mol‒1)c	(cal mol‒1)d
0	9.40	9.40	9.40	9.40	0.14	1.814(.027)	0.433 (.006)	‒196,147.4(11.8)	‒46,880.3(2.8)
3	0.37	0.37	0.37	0.36	.11	0.069 (.022)	.017(.005)	‒196,624.8(10.4)	‒46,994.5(2.5)
5	‒5.35	‒5.35	‒5.36	‒5.37	.10	‒1.036 (.020)	‒0.248(.004)	‒196,930.1(9.9)	‒47,067.4(2.2)
10	‒18.60	‒18.61	‒18.61	‒18.63	.06	‒3.595(.012)	‒ 0.859(.003)	‒197,647.1(7.7)	‒47,238.8(2.0)
15	‒30.35	‒30.36	‒30.36	‒30.39	.04	‒5.864 (.008)	‒1.402 (.002)	‒198,295.0(6.6)	‒47,393.6(1.7)
18	‒36.68	‒36.70	‒36.70	‒36.72	.04	‒7.086(.008)	‒1.694 (.001)	‒198,649.3(6.6)	‒47,478.2(1.3)
20	‒40.60	‒40.62	‒40.61	‒40.64	.04	‒7.843 (.008)	‒1.874 (.002)	‒198,870.4(6.6)	‒47,531.1(1.5)
25	‒49.35	‒49.37	‒49.36	‒49.39	.04	‒9.531 (.008)	‒ 2.278(.002)	‒199,370.3(6.6)	‒47,650.5(1.6)
28	‒53.88	‒53.90	‒53.89	‒53.92	.04	‒10.404(.008)	‒2.487 (.002)	‒199,632.2(6.6)	‒47,713.1(1.7)
30	‒56.60	‒56.62	‒56.61	‒56.63	.04	‒10.929(.008)	‒2.612(.002)	‒199,790.7(6.7)	‒47,750.8(1.7)
35	‒62.35	‒62.37	‒62.35	‒62.37	.06	‒12.036(.012)	‒2.877 (.002)	‒200,128.4(8.0)	‒47,831.8(1.8)
40	‒66.60	‒66.62	‒66.59	‒66.60	.09	‒12.853(.018)	‒3.072(.004)	‒200,380.6(10.0)	‒47,692.1(2.3)
43.6a	‒68.73	‒68.76	‒68.71	‒68.72	.13	‒13.261 (.025)	‒3.169(.007)	‒200,506.4(12.3)	‒47,927.0(3.3)