Enter your answer in kilojoules per mole of compound to three significant figure
ID: 788064 • Letter: E
Question
Enter your answer in kilojoules per mole of compound to three significant figures. A total of 2.00 mol of a compound is allowed to react with water in a foam coffee cup and the reaction produces 110g of solution. The reaction caused the temperature of the solution to rise from 21.0 to 24.7C What is the enthalpy of this reaction? Assume that no heat is lost to the surroundings or to the coffee cup itself and that the specific heat of the solution is the same as that of pure water. Enter your answer in kilojoules per mole of compound to three significant figures.Explanation / Answer
Heat content extracted = enthalpy of the reaction = m C dT = 110 * 4.186 * 3.7 = 1.703 KJ
{Since after the compound is dissolved, some heat is evolved, its an exothermic reaction, then that heat is utilized to raise the temperature of the SOLUTION by 3.7C given that specific heta of solution = that of water, so by deducing it the above equation gets applied}
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