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1. As can be seen from the temperature data, the temperature of the calorimeter is dropping with time. Hence it is well understood that the reaction absorbing heat from the surrounding thus dropping its temperature. Hence the reaction is endothermic
2. ΔHrxn means the change in enthalpy of reaction. In other words, when a reaction takes place, its enthalpy either changes positively or negatively. In endothermic reactions, this change is positive, because the reaction system tends to absorb heat from the surrounding hence the enthalpy after reaction tends to increase and thus will have positive sign.
CHMISILL: THERMOCHEMISTRY 15 Name Partner Lab Report 1 Data Sheet for Citric Acid + Baking Soda...
I reuploaded clearer pictures 1 Write net ionic equations for a Reaction 1 All- b. Reaction 2 AH:- c. Reaction 1 + Reaction 2 AH- d. Reaction 3 AH- 2. Do your results agree with Hess's law to within 1% discrepancy 5%? 10% Data Sheet for Hydrochloric Acid + Sodium Hydroxide Calorimetry temperatures to the thermometer's full available precision. You may not have to use all of the er each reaction, but be sure to thoroughly stir cach mixture so...