A calorimeter contains 23.0 mL of water at 14.5 °C . When 2.20 g of X (a substance with a molar mass of 50.0 g/mol ) is added, it dissolves via the reaction X(s) + H2O(1)→X(aq) and the temperature of the solution increases to 29.0 °C . Calculate the enthalpy change, AH, for this reaction per mole of X. Assume that the specific heat of the resulting solution is equal to that of water [4.18 J/(g·°C)], that density of water is 1.00 g/mL, and that no heat is lost to the calorimeter itself, nor to the surroundings. Express the change in enthalpy in kilojoules per mole to three significant figures.
A calorimeter contains 23.0 mL of water at 14.5 °C . When 2.20 g of X (a substance with a molar mass of 50.0 g/mol ) is added, it dissolves via the reaction X(s) + H2O(1)→X(aq) and the temperature of the solution increases to 29.0 °C . Calculate the enthalpy change, AH, for this reaction per mole of X. Assume that the specific heat of the resulting solution is equal to that of water [4.18 J/(g·°C)], that density of water is 1.00 g/mL, and that no heat is lost to the calorimeter itself, nor to the surroundings. Express the change in enthalpy in kilojoules per mole to three significant figures.
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Chapter1: Chemical Foundations
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![Part A
A calorimeter contains 23.0 mL of water at 14.5 °C . When 2.20 g of X (a substance
with a molar mass of 50.0 g/mol ) is added, it dissolves via the reaction
X(s) + H20(1)→X(aq)
and the temperature of the solution increases to 29.0 °C.
Calculate the enthalpy change, AH, for this reaction per mole of X.
Assume that the specific heat of the resulting solution is equal to that of water [4.18
J/(g.°C)], that density of water is 1.00 g/mL, and that no heat is lost to the
calorimeter itself, nor to the surroundings.
Express the change in enthalpy in kilojoules per mole to three significant figures.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F1f7b2820-1c5f-4fb2-8400-0eaafc647eb0%2F2730c09d-9887-483a-b4c5-1e813e20a2b7%2F0p9kcnz_processed.png&w=3840&q=75)
Transcribed Image Text:Part A
A calorimeter contains 23.0 mL of water at 14.5 °C . When 2.20 g of X (a substance
with a molar mass of 50.0 g/mol ) is added, it dissolves via the reaction
X(s) + H20(1)→X(aq)
and the temperature of the solution increases to 29.0 °C.
Calculate the enthalpy change, AH, for this reaction per mole of X.
Assume that the specific heat of the resulting solution is equal to that of water [4.18
J/(g.°C)], that density of water is 1.00 g/mL, and that no heat is lost to the
calorimeter itself, nor to the surroundings.
Express the change in enthalpy in kilojoules per mole to three significant figures.
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