The temperature versus time graph of a solid substance absorbing heat is shown. E
Temperature (°C)
B
С
A
Time (minutes)
What best describes the change taking place at point D on the graph? (1 point)
a
The entire solid transitions into the liquid phase as particles stop vibrating.
The entire liquid transitions into the gaseous phase as particles stop flowing.
Oь
0
C
Some liquid molecules gain enough energy to overcome their intermolecular forces.
Some solid molecules gain enough energy to overcome their intermolecular forces.

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.