Match each of the following physical and chemical properties with ethane, C 2 H 6 or sodium bromide, NaBr: a. boils at -89 °C

All right. Hi, everyone. So this question is asking us to identify whether the following property matches with butane C 4h 10 or potassium chloride KC as a boiling point of negative one °C. So to understand this question, what I want to point out here is that we can compare between an inorganic compound and an organic compound. Recall that an organic compound is one that contains carbon hydrogen or, or and or I should say carbon carbon bonds, other atoms can be included as well. But if no carbon hydrogen or carbon carbon bonds are present, then the compound is considered to be an organ. Now recall that organic compounds are characterized as having relatively low boiling points compared to inorganic compounds. And if we consider the given boiling point of negative one °C, that is in fact quite low. And because the boiling point is below room temperature, this implies that the compound is a gas at room temperature due to how low the boiling point happens to be. So because the boiling point is so low, we would expect this property to match with an organic compound. And so only one of the compounds provided matches this description if we consider the structure of butane, the molecular formula of butane only contains carbon and hydrogen. This means that butane must in fact be an organic molecule because notice how potassium chloride does not contain carbon or hydrogen, which means that it must be inorganic. So because of this, because butane is the organic compound of the two, we are examining, it would be expected to have a lower boiling point, which means that the boiling point of negative one °C would in fact match with but ta or C 4h 10 and there you have it. So our answer here is going to be beating. So with that being said, thank you so very much for watching and I hope you found this helpful.

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12. Introduction to Organic Chemistry

Introduction to Organic Chemistry

GOB Chemistry

12. Introduction to Organic Chemistry

Introduction to Organic Chemistry

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Problem 5a

Textbook Question

Match each of the following physical and chemical properties with ethane, C₂H₆ or sodium bromide, NaBr:
a. boils at -89 °C

Verified step by step guidance

Step 1: Understand the problem. You are tasked with matching the given property (boiling point of -89 °C) to either ethane (C₂H₆) or sodium bromide (NaBr). This requires knowledge of physical and chemical properties of these substances.

Step 2: Recall the boiling points of the two substances. Ethane (C₂H₆) is a small hydrocarbon and is a nonpolar molecule. It has a low boiling point because it only exhibits weak London dispersion forces. Sodium bromide (NaBr), on the other hand, is an ionic compound with strong ionic bonds, leading to a much higher boiling point.

Step 3: Analyze the given boiling point (-89 °C). This is a very low temperature, which is characteristic of substances with weak intermolecular forces, such as nonpolar molecules like ethane.

Step 4: Match the property to the correct substance. Since -89 °C is consistent with the boiling point of ethane (C₂H₆), this property should be matched to ethane.

Step 5: Conclude that the boiling point of -89 °C is a physical property of ethane (C₂H₆), as it relates to a phase change and does not involve a chemical reaction.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Physical Properties

Physical properties are characteristics of a substance that can be observed or measured without changing its chemical identity. Examples include boiling point, melting point, density, and color. Understanding these properties helps in identifying substances and predicting their behavior under different conditions.

Boiling Point

The boiling point is the temperature at which a liquid's vapor pressure equals the external pressure surrounding the liquid, causing it to change into vapor. It is a critical physical property that varies between substances and can indicate molecular structure and intermolecular forces. For instance, ethane has a boiling point of -89 °C, which reflects its low molecular weight and weak van der Waals forces.

Chemical Compounds

Chemical compounds are substances formed when two or more elements chemically bond together in fixed proportions. Ethane (C₂H₆) is a hydrocarbon, while sodium bromide (NaBr) is an ionic compound. Understanding the nature of these compounds helps in predicting their physical and chemical properties, such as boiling points and solubility.

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