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💏intro to chemistry review

C2H6

Written by the Fiveable Content Team • Last updated August 2025
Written by the Fiveable Content Team • Last updated August 2025

Definition

C2H6, also known as ethane, is a simple hydrocarbon compound composed of two carbon atoms and six hydrogen atoms. It is a key component in the study of hydrocarbons, which are organic compounds consisting solely of carbon and hydrogen atoms.

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5 Must Know Facts For Your Next Test

  1. Ethane (C2H6) is a colorless, odorless, and flammable gas that is the second-simplest alkane after methane (CH4).
  2. The molecular formula C2H6 indicates that the compound contains two carbon atoms and six hydrogen atoms.
  3. Ethane is a saturated hydrocarbon, meaning that all the carbon-carbon bonds are single bonds, and there are no double or triple bonds.
  4. Ethane is used as a fuel gas, a refrigerant, and a feedstock for the production of other chemicals, such as ethylene.
  5. The structural formula of ethane is typically represented as H3C-CH3, showing the arrangement of the carbon and hydrogen atoms.

Review Questions

  • Explain the significance of the molecular formula C2H6 in the context of hydrocarbons.
    • The molecular formula C2H6 represents the elemental composition of the hydrocarbon compound ethane, which is the simplest alkane after methane. The formula indicates that the compound contains two carbon atoms and six hydrogen atoms, following the general formula for alkanes (CnH2n+2). This information is crucial in understanding the structure, properties, and reactivity of hydrocarbons, as the number of carbon and hydrogen atoms directly influences the physical and chemical characteristics of the compound.
  • Describe the structural formula of ethane (C2H6) and explain how it relates to the compound's properties.
    • The structural formula of ethane, H3C-CH3, shows the arrangement of the carbon and hydrogen atoms in the molecule. The two carbon atoms are connected by a single bond, and each carbon atom is bonded to three hydrogen atoms. This arrangement, known as the tetrahedral structure, results in the compound being a saturated hydrocarbon, meaning that all the carbon-carbon bonds are single bonds and there are no double or triple bonds. The saturation of the bonds contributes to ethane's stability and low reactivity, as well as its physical properties, such as being a colorless and odorless gas at room temperature.
  • Analyze the role of ethane (C2H6) in the broader context of hydrocarbon chemistry and its applications.
    • Ethane (C2H6) is a fundamental building block in the study of hydrocarbons, as it represents the simplest alkane after methane. Understanding the properties and behavior of ethane is crucial for comprehending the broader principles of hydrocarbon chemistry. Ethane's use as a fuel gas, refrigerant, and feedstock for the production of other chemicals, such as ethylene, demonstrates its importance in various industrial and commercial applications. Furthermore, the study of ethane and its reactions can provide insights into the reactivity and transformations of more complex hydrocarbon compounds, which is essential for advancements in areas like petrochemistry, energy production, and material science.
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