Endothermic calorimetry?

Question

Could I use an endothermic reaction to accurately measure the heat capacity of a calorimeter?

Answer 1

To answerer 1 and to the asker: the heat capacity of a calorimeter is commonly called the calorimeter constant. It's the unavoidable heat capacity (Mass * specific heat) of the container and any other apparatus inside the insulated space.
To answer the question, yes, an endothermic reaction should do just fine. A temperature change is all that's needed; it can be in either direction.

Answer 2

Ummm, "the heat capacity of a calorimeter" ???

A calorimeter (Burns?) is simply a vessel for doing an experiment in, the heat capacity of (specific latent?) would be to do with material, size and all sorts - but would be no more significant than the figure for a spittoon or toilet roll holder made of a similar material.

What EXACTLY do you mean by "heat capacity" ???

Do you mean the amount of heat produced from the calorimeter during an experiment on a test material?

If so, may I suggest that in the sciences you need to be a wee bit more specific when writing both your questions AND your answers if you wish to get reasonable results (and marks?)