Question

Which of the following option is appropriate for the TGA and DTA?

(a) TGA and DTA measures only weight

(b) TGA measures only weight while DTA measures other effects

(c) TGA and DTA measures only temperature

(d) TGA measures only temperature while DTA measures other effects

The question was posed to me during an interview.

The question is from Applications of DTA and TGA in chapter Thermal Analysis of Solid State Chemistry

Answer 1

The correct choice is (b) TGA measures only weight while DTA measures other effects

To explain I would say: DTA is more versatile than TGA, TGA detects effects which involve weight changes only. DTA also detects such effects in addition, detects other effects such as polymorphic transitions, which do not involve changes in weight.