B) dispersion forces 6 0 obj These arrangements are more stable than arrangements in which two positive or two negative ends are adjacent (Figure \(\PageIndex{1c}\)). In which of the following compounds will hydrogen bonding occur? However, ethanol has a hydrogen atom attached directly to an oxygen - and that oxygen still has exactly the same two lone pairs as in a water molecule. Accessibility StatementFor more information contact us atinfo@libretexts.org. 13.1: Intermolecular Interactions - Chemistry LibreTexts What intermolecular forces present in ethanol? | Socratic Consequently, even though their molecular masses are similar to that of water, their boiling points are significantly lower than the boiling point of water, which forms four hydrogen bonds at a time. Ethanol, C2H&boils at 78C. 1.Which of the following is TRUE of polar molecules? i. Have high D) Gas molecules move constantly and in straight lines. polarity Which is the best reason why ethanol (C2H6O) has a higher viscosity than octane (C8H18)? In addition, the attractive interaction between dipoles falls off much more rapidly with increasing distance than do the ionion interactions. Imagine the implications for life on Earth if water boiled at 130C rather than 100C. As a result, the CO bond dipoles partially reinforce one another and generate a significant dipole moment that should give a moderately high boiling point. Accessibility StatementFor more information contact us atinfo@libretexts.org. Chapter 6 Flashcards | Quizlet See Answer Liquids boil when the molecules have enough thermal energy to overcome the intermolecular attractive forces that hold them together, thereby forming bubbles of vapor within the liquid. What is the relationship between viscosity and intermolecular forces? Asked for: formation of hydrogen bonds and structure. Arrange GeH4, SiCl4, SiH4, CH4, and GeCl4 in order of decreasing boiling points. The ease of deformation of the electron distribution in an atom or molecule is called its polarizability. Usually, intermolecular forces are discussed together with The States of Matter. A) dipole forces Legal. We also acknowledge previous National Science Foundation support under grant numbers 1246120, 1525057, and 1413739. Notice that in each of these molecules: Consider two water molecules coming close together.