This isn't how temperature or chemistry works. There are no magic ingredients that deliver a target temperature for a sustained period of time. Reactions do give off (or absorb) heat, but the temperature of the resulting system, to say nothing of its time dependence, depends on the physical properties (heat capacity, etc.) of the medium in which the chemicals are placed, the volume and shape of the system, the amount and concentration of ingredients, and a variety of engineering parameters such as the mixing rate, rate of ingredient addition, insulation properties of the system, and so forth. Just not possible to answer this question I'm afraid.