Temperature to Attack Potency?

[Edenstar]

Is it possible to determine the Attack Potency of an attack judging only from its temperature?

More specifically, there is a character who can generate fire of one trillion degrees (66,666 times the heat of the sun's core), and also generate cold of minus one trillion degrees. However, her attacks have never been shown and she cannot be properly powerscaled to any other individual in the franchise. So is there a way to convert temperature to energy in joules?

Also, Genryüsai Shigekuni Yamamoto can engulf his body with a heat of 15,000,000 degrees (the temperature of the sun's core). So if it is indeed possible to convert that into joules, perhaps his profile might be in need of an update.

 

[WeeklyBattles]

Hmm...66,666 times the heat of the sun's core (15,000,000 C) comes out to 999,990,000,000 C, converted here comes out to 1.9e+15 Joules, or Large Town level+. Not sure how to do the -One Trillion.

15,000,000 C in that same converter is 28486507500 Joules, Large Building level+

 

[Antoniofer]

Can't convert to energy but can be converted to power: a human (size) body that can generate 15M K has a power of 5.368*10^21 Watts, the 1/67k part of the Sun power.

I think that it misses some dats in the first part to convert to something.