Question

Determine the normal boiling point (in kelvin) of dichloromethane, CH₂Cl₂. Find the actual boiling point using the Internet or some other source, and calculate the percent error in the temperature. Explain the differences, if any, between the two values.

a) 331 K; 338 K; 2.07%
b) 311 K; 312 K; 0.32%
c) 341 K; 334 K; 2.06%
d) 321 K; 327 K; 1.86%

Answer 1

After comparing given values with the actual boiling point of dichloromethane (312 K), option (b) with an experimental value of 311 K and a percent error of 0.32% is identified as the best match.

Step-by-step explanation:

To determine the normal boiling point of dichloromethane (CH₂Cl₂) in kelvin, we will compare the given options with the actual boiling point obtained from reliable sources. After researching, we find that the boiling point of dichloromethane is approximately 312 K. We then calculate the percent error using the formula: Percent Error = (|Experimental Value - Accepted Value| / Accepted Value) × 100%. By performing the calculation for each given option, we can identify the correct answer based on its percent error.

If we take the given data (b) as an example:

Experimental Value = 311 K
Accepted Value = 312 K
Percent Error = (|311 K - 312 K| / 312 K) × 100%
Percent Error = (1 K / 312 K) × 100%
Percent Error = 0.32%