A chemist combines hydrochloric acid with a sodium hydroxide solution,transferring 5.75 kJ of heat.Express this in calories.

Question

Quizplus · Accepted Answer

The conversion factor between kJ and cal is 1 kJ = 239 cal. Therefore, to convert 5.75 kJ to calories, we multiply by 239 to get:
5.75 kJ * 239 cal/kJ = 1372.25 cal
Rounding to two significant figures, we get 1.4 x 10^3 cal or 1.37 x 10^3 cal. The closest answer choice is E, which is 1.37 x 10^3 cal, so that is the best choice.

A Chemist Combines Hydrochloric Acid with a Sodium Hydroxide Solution,transferring