When 8.36 g of a salt dissolves in 142 mL of water (density = 1.00 g/mL) in a coffee-cup calorimeter, the temperature rises from 20.1°C to 23.6°C. Determine q for the solution process, assuming that Ccal = Cwater- Include the mass of salt in your calculation.

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Chapter1: Chemical Foundations
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When 1.350 g of benzoic acid (C7H,O2) burns completely in excess O2 gas at constant pressure and 298.0 K, it releases 35.61 kJ of
energy.
Your answer is correct.
Write the balanced chemical equation for this reaction. Ignore aggregation states in your answer.
2C,H,0, + 150,+14CO, + 6H,0
eTextbook and Media
X Incorrect.
(a) What is the molar energy of combustion (in kJ/mol) of acetylene?
i
3221.52
kJ/mol
(b) How much energy (in kJ) is released per mole of O2 consumed?
i
429.536
kJ
Transcribed Image Text:When 1.350 g of benzoic acid (C7H,O2) burns completely in excess O2 gas at constant pressure and 298.0 K, it releases 35.61 kJ of energy. Your answer is correct. Write the balanced chemical equation for this reaction. Ignore aggregation states in your answer. 2C,H,0, + 150,+14CO, + 6H,0 eTextbook and Media X Incorrect. (a) What is the molar energy of combustion (in kJ/mol) of acetylene? i 3221.52 kJ/mol (b) How much energy (in kJ) is released per mole of O2 consumed? i 429.536 kJ
When 8.36 g of a salt dissolves in 142 mL of water (density = 1.00 g/mL) in a coffee-cup calorimeter, the temperature rises from 20.1°C
to 23.6°C. Determine q for the solution process, assuming that Ccal = Cwater-
Include the mass of salt in your calculation.
Transcribed Image Text:When 8.36 g of a salt dissolves in 142 mL of water (density = 1.00 g/mL) in a coffee-cup calorimeter, the temperature rises from 20.1°C to 23.6°C. Determine q for the solution process, assuming that Ccal = Cwater- Include the mass of salt in your calculation.
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