Question

The Ti and Tf temperature depends on which of the following factor?

(a) Cooling rate

(b) Mechanical property of the material

(c) Thermal expansion coefficient

(d) Atmosphere above the sample

I have been asked this question in an interview for job.

Query is from Thermogravimetric Analysis in portion Thermal Analysis of Solid State Chemistry

Answer 1

Correct answer is (d) Atmosphere above the sample

The best explanation: Initial and final temperature Ti, Tf depends on variables such as heating rate, the nature of the solid (e.g. its particle size) and the atmosphere above the sample. The effect of the atmosphere can be dramatic.