In two or more complete sentences describe how a constant pressure calorimeter can be made, and how it is used to measure energy transfer.

Heat capacity is the ratio of the amount of heat energy transferred to an object to the resulting increase in its temperature. Molar heat capacity is a Data collected during a constant-pressure calorimetry experiment can be used to calculate the heat capacity of an unknown substance

A constant calorimeter can be made if we are studying a thermal process at atmospheric pressure or in an open calorimeter.

The heat capacity can be measured in open calorimeter which is defined as the heat change in a substance if it is cooled or heated by one degree celsius or one kelvin.

The unit will be calorie/K or J / K

It is also expressed as enthalpy of a thermal process.

The heat capacity for one mole of a substance is molar heat capacity.

Heat capacity is an extensive property as it depends upon the mass.

The molar heat capacity is an intensive property as it is independent of mass of material or substance.

that's what i got you can count the number of atoms

c-14 is carbon-14, or radiocarbon.   it is a radioactive isotope of carbon with an atomic nucleus containing 6 protons and 8 neutrons.