The boiling point of ethane is -85 c. This temperature will be equivalent to ______k.
The correct answer and explanation is:
The boiling point of ethane is -85 °C. To convert this temperature to Kelvin (K), use the formula:
K = °C + 273.15
So,
K = -85 + 273.15 = 188.15 K
Answer: The boiling point of ethane is 188.15 K.
Explanation (300 words)
Temperature conversion between Celsius and Kelvin scales is straightforward because both scales have the same size degree, but their starting points differ. The Celsius scale is based on the freezing point of water (0 °C) and the boiling point of water (100 °C) under standard atmospheric pressure. The Kelvin scale, used primarily in scientific contexts, starts at absolute zero (0 K), which is the theoretical lowest temperature possible where all molecular motion stops.
To convert from Celsius to Kelvin, you add 273.15 because 0 K corresponds to -273.15 °C. This relationship ensures that temperatures in Kelvin are always positive, making it easier and more logical to work with in physics and chemistry, especially in gas laws and thermodynamics.
Ethane (C₂H₆) is a simple hydrocarbon gas at room temperature. Its boiling point is the temperature at which ethane transitions from a liquid to a gas at atmospheric pressure. Given its boiling point at -85 °C, converting it to Kelvin helps in calculations where absolute temperature is necessary, such as when applying the Ideal Gas Law (PV = nRT) or studying phase changes under varying pressures.
In this case:
- Start with -85 °C,
- Add 273.15,
- Resulting in 188.15 K.
This temperature indicates that ethane boils well below room temperature, consistent with its gaseous state under normal conditions.
Understanding temperature conversions is fundamental for chemistry students and professionals, as it ensures accurate interpretation of thermodynamic data and proper application of temperature-dependent equations in research and industry.