Thermochemistry

Name: Callie Archibald Partner: Coral Hutchinson Formal Laboratory cogitation C125 observational Chemistry I Section 8000 IUPUI October 21, 2012 Thermochemistry INTRODUCTION In chemistry it is often prerequisite to determine how readiness moves. each substance has a kindle capacity. When substances reply energy is any indifferent or released in the cause of combust. If the energy is absorbed we say that the reaction is endothermic and if energy is released the reaction is exothermic. In thermodynamics energy and its changing forms 1 be studied. To find the heat of a reaction, a simple device called a calorimeter is used. By victimisation this device and taking measurements of aggregate temperature the heat of a reaction gutter be determined. ?H rxn = -(C calorimeter +C restrict ) ?T (1) Eq. 1 shows that when the particularised heat of a calorimeter is added to the specific heat of the contents of the calorimeter, then multiplied by the transm ute in temperature, the heat of the reaction can be determined. In localize to find the heat of the reaction, first C (heat capacity) has to be found. The C versatile is the heat capacity for each substance. C essential be calculated for both the calorimeter and its contents. C = (C SH ) x (mass of the substance) (2) Eq.

2 shows that when the C SH (specific heat) of a substance is multiplied by the mass of the substance, then C (heat capacity) can be found. The flash variable we need to find it the change in temperature (?T). ?T = T f - T i (3) Eq. 3 shows that when the ?T (change in termperat ure) can be found by subtracting the initia! l temperature (T i ) from the last(a) temperature (T f ). EXPERIMENTAL For part I, a calorimeter was constructed using a beaker, dickens Styrofoam cups, cardboard, a rubber stopper, and a thermometer. 50.0 mL of water from the carboy was situated in the calorimeter, and then allowed to reach temperature equilibrium. 50.0 mL of water from the carboy was modify until 40C° warmer than room...If you want to get a full essay, browse it on our website: OrderCustomPaper.com

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