At standard pressure, 15.0 grams of a compound at it boiling point is completely vaporized by 4 900 calories of heat. What is the heat of
vaporization of this compound?
1. 330 cal/g
2. 74 000 cal/g
3. 80. cal/g
4. 3.1 cal/g

Exothermic,  physical change after it is already baked

Answerit curves up and levels out.explanationwe assume that the container contains absolutely no ammonia to begin with as it states that "nitrogen gas and hydrogen gas" react to "produce ammonia."at dynamic equilibrium, the product and reactant concentrations are equal.this means that, starting from a concentration of zero, [nh₃] must curve "up" from zero and then level out to a constant concentration.

What are the statements?

Answer:   d.  carbon dioxide.