Dihedral Angle	Stretch	Bend	Stretch-Bend	Torsion	Non-1,4 VDW	1,4 VDW	Total
180	0.1538	0.2255	0.0437	0.0083	-0.3798	2.1878	2.2394
165	0.1464	0.2255	0.0437	0.3363	-0.3221	2.328	2.7577
150	0.1465	0.2254	0.0437	1.1383	-0.2133	2.6388	3.9794
135	0.1465	0.2254	0.0437	1.9654	-0.153	2.9631	5.1911
120	0.1466	0.2254	0.0437	2.3628	-0.167	3.1062	5.7178
105	0.1466	0.2254	0.0437	2.1299	-0.23	2.9833	5.299
90	0.1467	0.2254	0.0437	1.4313	-0.2661	2.6884	4.2696
75	0.1467	0.2254	0.0437	0.6954	0.0101	2.4248	3.546
60	0.1466	0.2254	0.0437	0.3608	0.8837	2.3738	4.034
45	0.1465	0.2254	0.0437	0.6204	1.8447	2.6083	5.489
30	0.1464	0.2255	0.0437	1.3113	2.4511	3.0563	7.2344
15	0.1464	0.2256	0.0437	2.0157	3.4426	3.5048	9.3787
0	0.1463	0.2255	0.0437	2.3103	4.1824	3.695	10.6032
-15	0.1462	0.2256	0.0437	2.0186	3.4176	3.5059	9.3577
-30	0.1462	0.2257	0.0437	1.3155	2.3944	3.0577	7.1833
-45	0.1461	0.2258	0.0437	0.6233	1.7772	2.6092	5.4254
-60	0.1462	0.2258	0.0437	0.3608	0.8441	2.3736	3.9942
-75	0.1463	0.2258	0.0438	0.6925	0.0014	2.4234	3.5332
-90	0.1462	0.2258	0.0438	1.4273	-0.2615	2.6867	4.2681
-105	0.1462	0.2258	0.0437	2.127	-0.2241	2.9819	5.3004
-120	0.1461	0.2258	0.0437	2.3628	-0.1656	3.106	5.7189
-135	0.1463	0.2257	0.0437	1.9683	-0.1569	2.9642	5.1913
-150	0.1463	0.2257	0.0438	1.1424	-0.219	2.6402	3.9793
-165	0.1463	0.2256	0.0437	0.3392	-0.3258	2.329	2.758
-180	0.1464	0.2256	0.0437	0.0083	-0.3799	2.203	2.2472
For this experiment, the C2-C3 bond was rotated by increments of 15° until we reached a complete 360°.  The Total Steric Energy of n-butane was at its lowest when it reached 0°. The Steric Energies that were calculated were Stretch, Bend, Stretch-Bend, Torsion, 1,4 VDW, and Non-1,4 VDW.  Three major factors and contributors to the rotation of n-butane are torsion, 1,4 VDW, and Non-1,4 VDW.