= Calorimeter
{wiki}
A calorimeter infers transferred <heat> from a measured change, such as a <temperature> change and a calibrated <heat capacity>. The <heat-engine calorimetry> example requires accounting for the vessel and <heat transfer> to the surroundings as well as the <water>.
A practical receiver has an inner vessel, insulation or an outer shield, a lid, a <thermometer> and a stirrer. Its participating <heat capacity> includes the immersed parts that follow the <water>'s <temperature>. Insulation reduces <heat transfer> to the room; stirring makes a single reading more representative of the contents. These serve different purposes: a well-insulated vessel can still have substantial <heat capacity>, and a uniform <temperature> does not imply zero external <heat transfer>.
The University of Toronto's <Heat Capacity (University of Toronto laboratory handout)> describes a <copper> inner vessel, outer shield, <thermometer> and heated metal block. Weigh the block and receiving <water>, heat the block in a bath, then transfer it quickly into enough <water> to cover it. The observed <temperature> rises, reaches a maximum, then falls. The inferred <specific heat capacity> comes from the block's cooling and the warming of both <water> and vessel. In its cooling exercise the handout deliberately exposes the inner vessel to room air, recommends readings every $15\,\mathrm s$, and uses the later common cooling to estimate the earlier loss. Starting below room <temperature> reduces exchange without guaranteeing cancellation. The handout notes limited time and thermometry for small corrections; it supplies no dataset.<Heat Capacity (University of Toronto laboratory handout)>[pp. 1–3, The Method of Mixtures and Cooling Correction, Figure 1]{ref}
For a proposed modern version, independently perform <thermometer calibration> and <calorimeter calibration>, record bath and room <temperatures>, and keep immersion depth, lid position and stirring rate fixed. Ensure the block actually reaches bath <temperature>; minimize and account for adhering hot bath <water>. Compare repeated transfers with different delays and a reference sample of known <specific heat capacity>. A resting run tests environmental <heat transfer>, while a stirred run with no added sample checks mechanical input. These are proposed controls, not claimed observations from the handout. Sensor delay, changing <heat capacity>, incomplete <thermal equilibrium> and material escaping the boundary limit the resulting estimate.
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