Coffee cup calorimetry?
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A total of 2.00 mol of a compound is allowed to react with water in a foam coffee cup and the reaction produces 195 g of solution. The reaction caused the temperature of the solution ...show more
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Answer:
Answer: (- 1.51 * 10^3 kJ/mol) or -1510 kJ/mol Method: -q of reaction = q of solution Find q of solution. q of solution = m * c * deltaT. (195)(4.184)(24.7 - 21.0) / 2 mol = 1509.378 J/mol Then convert to "kilojoules per mol" and write correct number of significant figures. The answer HAS TO BE NEGATIVE because heat is being released and "q of reaction" is negative.
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Other answers
q = ms(delta t) delta t = 24.7 C - 21.0 C = 3.7 C m = 195g s = 4.184 J/(g C) q = 195 * 3.7 * 4.184 = 3018.756 J Convert J to kJ q = 2447.64/1000 = 3.018756 kJ Enthalpy of Reaction = 3.018756 kJ/2 mol = 1.5 kJ/mol
XOverLord10X
molar enthalpy= [195degC* 4.184j/gdegC*3.7degC]/2m= 1.5Kj/m
NC4TC
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