Vypočítejte bod tání a bod varu H2O. K dispozici jsou následující termodynamické údaje:															
															
fáze	H	S	G	V		cp	M	r		T° =	298.15				
	kJ/mol	J/K mol	kJ/mol	cm3		J/K mol	g/mol	g/ccm		Ta =	273.15				
led	-291.84	48.06	-236.62	19.65		37.89	18.015	0.917							
voda	-285.83	69.91	-237.13	18.07		75.19	18.015	0.997							
pára	-241.82	188.83	-228.57	24789		33.58	18.015	0.00073							
															
															
															
															
															
															
															
															
															
															
															
															
															
															
															
															
															
															
															
															
															
															
															
															
															
															
Řešení															
Bez závislosti H a S na teplotě							Diagram			led	voda	pára			
	G = H – TS							T	T	Gs	Gl	Gg			
Za rovnováhy								°C	K	J/mol	J/mol	J/mol			
	Gled = Gvoda							-30	243.15	-233976.7	-233284.95	-218184.35			
	Hled – Tr Sled = Hvoda – Tr Svoda 							-20	253.15	-234457.3	-233984.05	-220072.65			
	Tr = (Hvoda – Hled) / (Svoda – Sled)							-10	263.15	-234937.9	-234683.15	-221960.95			
	Tr = ΔH / ΔS							0	273.15	-235418.5	-235382.25	-223849.25			
	voda-led	Tr =	275.1	K	1.9	°C		10	283.15	-235899.1	-236081.35	-225737.55			
Obdobně voda-pára								20	293.15	-236379.7	-236780.45	-227625.85			
	voda-pára	Tr =	370.1	K	96.9	°C		30	303.15	-236860.3	-237479.55	-229514.15			
								40	313.15	-237340.9	-238178.65	-231402.45			
								50	323.15	-237821.5	-238877.75	-233290.75			
								60	333.15	-238302.1	-239576.85	-235179.05			
								70	343.15	-238782.7	-240275.95	-237067.35			
								80	353.15	-239263.3	-240975.05	-238955.65			
								90	363.15	-239743.9	-241674.15	-240843.95			
								100	373.15	-240224.5	-242373.25	-242732.25			
								110	383.15	-240705.1	-243072.35	-244620.55			
								120	393.15	-241185.7	-243771.45	-246508.85			
								130	403.15	-241666.3	-244470.55	-248397.15			
															
															
Se závislostí H a S na teplotě															
HT2 = HT1 + cp (T2 – T1)				T° =	298.15	K									
ST2 = ST1 + cp ln (T2 / T1)															
								Termodynamika		led	voda				
	Gled = Gvoda							T	T	Gled	Gvoda				
odhad	Tr =	273.2272659	K	0.08	°C			°C	K	J/mol	J/mol				
	Gled =	-305011.9191						-60	213.15	-302594.2437	-301743.8805	850			
	Gvoda =	-305011.9191						-50	223.15	-302956.4369	-302208.0107	748			
	ΔG =	-2.10712E-08						-40	233.15	-303335.6155	-302705.8471	630			
								-30	243.15	-303731.0503	-303235.9429	495			
	Gvoda = Gpára							-20	253.15	-304142.0725	-303796.9708	345			
odhad	Tr =	373.1336427	K	99.98	°C			-10	263.15	-304568.066	-304387.7081	180			
	Gvoda =	-312571.8157						0.08	273.23	-305012.0415	-305012.0923	0			
	Gpára =	-312571.8157						10	283.15	-305462.7319	-305653.8758	-191			
	ΔG =	3.77942E-07						20	293.15	-305930.3865	-306327.2866	-397			
								25	298.15	-306169.089	-306673.6665	-505			
								30	303.15	-306410.9687	-307026.3514	-615			
								40	313.15	-306904.052	-307750.2235	-846			
								50	323.15	-307409.237	-308498.1106	-1089			
								60	333.15	-307926.149	-309269.2693	-1343