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Water has a very high heat of vaporization, 40.8 kJ/mol, due to the extensive hydrogen bonding between water molecules. Which of the following processes would be expected to have an enthalpy change of -40.8 kJ/mol? A. sublimation B. freezing C.…
Leak channels are non-gated, perpetually open transmembrane proteins essential for setting a cell’s resting membrane potential by allowing passive ion flow down electrochemical gradients. Primarily comprising potassium and sodium types, these channels are crucial for neuronal excitability, muscle function, and…
A 1-L beaker is filled with 2 moles of liquid methanol and 0.25 moles of NaCl. The ratio of ions to atoms in this solution is: A. 0.5:2 B. 1:6 C. 1:25 D. 3:1
Given the reduction potentials for the following half-reactions, Br2 (l) + 2e– → 2 Br–(aq) Eored= + 1.07 V Au3+ (aq) + 3 e– → Au (s) Eored= + 1.55 V What is the electrochemical potential for the following chemical reaction? 2…
If a gas occupies 0.1L at 200atm, what will its volume be at 1atm? A. slightly less than 20L B. 20L C. slightly more than 20L D. 2000L Click for Explanation Ideal gases undergoing pressure and volume changes are related…
In comparison with 1,2-dihydroxyethane, ethanol has weaker intermolecular hydrogen bonds resulting in: A. a lower boiling point for ethanol due to weaker intermolecular forces. B. ethanol being a stronger base. C. a higher boiling point because ethanol is a higher…
The standard reduction potentials for Zn and Cu are given below: Zn2+(aq) + 2e– → Zn(s) E°= -0.76 V Cu+(aq) + e– → Cu(s) E°= 0.52 V What is the standard state cell potential for the following reaction? Zn(s) +…
Methyl propanoate is synthesized primarily through the esterification of propionic acid with methanol using an acid catalyst. It can also be produced by the carboalkoxylation of ethylene with carbon monoxide and methanol, which achieves yields over 95%. What is the…
Consider the following reaction: C6H12O6 (s) + 6 O2 (g) → 6 CO2 (g) + 6 H2O (l) ΔH = – 2808 kJ / mol Under what conditions will this reaction proceed spontaneously? A. Low temperature, low pressure B. Low…
According to Charles’s Law, what happens to a gas as the temperature is decreased? A. Volume decreases B. Pressure decreases C. Volume increases D. Number of moles of gas increases Click for Explanation Charles’s Law states: ΔG = ΔH –…