What is the molecular weight of methane? Which compound has the lowest normal boiling point? How does hydrogen bonding affect melting point and boiling point? What chemical element has the lowest boiling point? What property of water results from its high boiling point?
Why is hydrogen bonding only possible with hydrogen? Why are hydrogen bonds the strongest of the intermolecular forces? Explain how the bonds in methane, ammonia, and water are formed, why there are differences in bond angles between the molecules, and why the molecules show different polar...
Hydrogen bonding in ionic liquids based on the 1-(2′-hydroxylethyl)-3-methylimidazolium cation ([C2OHmim]+) and various anions ([A]−) of differing H-bond acceptor strength, viz. hexafluorophosphate [PF6]−, tetrafluoroborate [BF4]−, bis(trifluoromethanesulfonimide) [Tf2N]−, ...
Hydrogen bonding is stronger (than van der Waals forces) /IMF in ice stronger (than IMF in methane)/ H bonds take more energy to breakNot H Bonds are strong (needs comparison)’If (b)(i) OR (ii) is incorrect, cannot award (b)(iii)If (b)(i) and /or (ii) is blank, can scor...
Chemically, methane can be produced by heating hydrogen gas and carbon monoxide gas at 573 K temperature in presence of a nickel catalyst. Fractional distillation of natural gas gives the pure form of methane. Uses of Methane Methane is a greenhouse gas that affects ambient temperature. It is ...
Further improved oxidation stability was achieved by the cysteine modification, which combined the effects of hydrogen bonding and coordination bonds for a period of over 120 days. The verification of H-bond and Ti-S bond formation is achieved through simulation and experimental data, attributing the...
and shipping methods capable of handling hydrogen's unique properties. For long-distance transport, the chemical conversion of H2 into energy carriers such as ammonia, methanol or e-methane plays an important role to maintain overall efficiency. Storage solutions are equally important, as they enable...
(ring) inter-actions, which control the alignment of phenyl rings; concurrently, non-classical hydrogen-bonding inter-actions are found between the cationic complex and the tetra-fluorido-borate anion. Two structural units, along with di-chloro-methane solvate molecules exhibiting an occupancy of ...
Thermal and infrared spectroscopic studies on hydrogen-bonding interaction of biodegradable poly(3-hydroxybutyrate)s with natural polyphenol catechin Thermal and infrared spectroscopic studies were performed on the hydrogen-bonding interaction in the blends of biodegradable atactic, highly syndiotactic a... ...
The observation of cholesterol strengthening hydrogen bonding with -Syn contrasts with the potential for weakened coulomb and hydrophobic interactions between -Syn and lipid membranes due to cholesterol. Moreover, cholesterol impacts the decrease in lipid packing defects and the reduction in lipid fluidity...