Two liquid compounds, A and B, have the same molecular weight. Samples of A & B were placed on temperature probes and allowed to evaporate, as in today's experimental procedure. After 105 seconds, Liquid A had a ΔT of 10.2ºC, and liquid B had a ΔT of 3.7ºC.
1. Which of the two liquids required more energy to overcome intermolecular attractions and evaporate? Explain your reasoning.
2. Which of the two liquids has higher intermolecular attractions? Explain your reasoning.
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liquid B requires more energy to overcome the inter-molecular attractions. This is because for a liquid to evaporate or boil the intermolecular forces must be broken first. Since liquid B had a lower change in temperature this means that it has stronger intermolecular forces that are not easily overcome by heat.
As indicated liquid B has higher intermolecular forces since they require more energy to break
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