Under which conditions is a reaction spontaneous?

when the temperature is zero and the enthalpy is positive and high and the entropy of the change is negative and high.

when the temperature and entropy of a change are high and positive and the enthalpy is low and negative.

when the enthalpy of the change is small and negative and the product of temperature and entropy is large and negative.

when the temperature and the enthalpy are positive and high and the entropy of the change is negative and high.
done

the correct answer is b. a strong acid completely dissociates to its ions when dissolved in water. completely dissociates to and ions. a is incorrect because does not fully ionize to and ions and some remain as the compound . c and d are incorrect because, and do not fall into the category of bronsted lowry acids. a bronsted lowry acid is a proton donor and since both molecules do not have a proton to donate they are not bronsted lowry acids. likewise,   if we use the lewis acid definition, they cannot be acids. a lewis acid is an electron pair acceptor. both and have a complete octet so can not accept any electrons which disqualifies them as acids.