Final answer:
The boiling point of the substance is 234K. The statement that the conversion of -39°C to Kelvin is 234K by adding 273 is false; the correct conversion should include 273.15, making it 234.15K.
Step-by-step explanation:
The boiling point of a substance can be calculated by adding 273 to the given temperature in degrees Celsius. In this case, the boiling point is -39°C + 273 = 234K. Therefore, the statement is True.
The statement that the conversion of -39°C to Kelvin is 234K by adding 273 is false; the correct conversion should include 273.15, making it 234.15K. The reference information confirms the correct formula for Celsius to Kelvin conversion and the boiling temperature of ammonia.
If the question is stating that a substance boils at -39°C and then adds 273 to get 234K, this calculation is incorrect because the correct way to convert Celsius to Kelvin is to add 273.15, not just 273. Therefore, the correct conversion should be -39°C + 273.15 = 234.15K.
Additionally, using the provided reference information, we can confirm that the correct formula for converting between the Celsius and Kelvin temperature scales is TK = TC + 273.15 and TC = TK - 273.15. Therefore, the temperature for the boiling ammonia should indeed be converted by subtracting 273.15, not 273, which matches with the information given that subtracting 273.15 from 239.8K gives a boiling temperature of -33.4°C for ammonia.
Hence, the statement given is False as it should rather be -39°C + 273.15 to correctly convert the temperature to Kelvin.