rate - 2 (g) + MgCl 2 (aq)) is an exothermic reaction,...

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Lab Report – Endothermic and Exothermic Reactions Jacky Chong Result: Part I Part II Final temperature, t 2 / °C 1.2 40.6 Initial temperature, t 1 / °C 20.7 20.7 Temperature change, t / °C -19.5 19.9 Optimum time, t max / sec 209 121 Par t I - Ci t r i c Aci d pl us Baki ng Soda 0 5 10 15 20 25 0 50 100 150 200 250 300 350 Ti me / Second Temperature / °C Par t I I - Hydr ochl or i c Aci d pl us Magnesi um 0 5 10 15 20 25 30 35 40 45 0 50 100 150 200 250 300 350 Ti me / Second
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Conclusion: Part I (H 3 C 6 H 5 O 7 (aq) + 3NaHCO 3 (s) 3CO 2 + 3H 2 O(l) + Na 3 C 6 H 5 O 7 (aq)) is an endothermic reaction, since the system absorbs heat from the surroundings, causing a decrease of temperature; Part II (Mg(s) + 2HCl(aq) H
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Unformatted text preview: 2 (g) + MgCl 2 (aq)) is an exothermic reaction, since the system releases heat to the surroundings, causing an increase of temperature. The reaction of part II took place at a greater rate. It has slightly greater temperature change and it reaches the optimum temperature significantly earlier than the reaction of part I. Collision theory simply means that if anything increases the collision rate, then the rate of reaction increases. The main factors affecting the collision rate are concentration of reactant, pressure, and surface area....
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rate - 2 (g) + MgCl 2 (aq)) is an exothermic reaction,...

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