Salma Ahmed
English Lit. GCSE Student
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Finding the enthalpy of decomposition of Sodium Hydrogencarbonate
- Words:
- 1334
- Submitted:
- Tue Sep 21 2004
Have a little read: ... Chemistry Coursework Finding the enthalpy of decomposition of Sodium Hydrogencarbonate IMPLEMENTING PART ONE: THE REACTION OF SODIUM CARBONATE WITH HYDROCHLORIC ACID I decided to add 2.76g of sodium carbonate to the hydrochloric acid solution at the fourth minute, consequently there is no result for this time in my result's table that follows- (The start temperature of the acid was 20.5°C) TIME (MINUTES) TEMPERATURE (°C) 0 20.5 3 20.4 Na2CO3 ADDED - 5 26.6 6 26.6 7 26.6 8 26.4 9 26.2 10 26.0 PART TWO: THE REACTION OF SODIUM HYDROCARBONATE WITH HYDROCHLORIC ACID I decided to add 3.65g of sodium hydrogencarbonate to the hydrochloric acid solution at the fourth minute, consequently there is no result for this time in my result's table that follows- (The start temperature of the acid was 20.5°C) TIME (MINUTES) TEMPERATURE (°C) 0 20.5 3 20.4 NaHCO3 ADDED - 5 11.8 6 11.8 7 12.0 8 12.1 9 12.3 10 12.4 In order to find the exact change in temperature for each part of the experiment I will have to draw a graph and extrapolate back from my line of best fit for each set of results. ANALYSIS If I assume that the relative formula mass (Mr) of the
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