What is the mass, in grams, of 9.03x1023 molecules of methanol

Chemistry
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ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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Chapter1: Chemical Foundations
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Constants: R:0.08206 atm. L/mol. K, Avogadro's Number (NA=6.022x1023 mol1)
Q1. (a) What is the mass, in grams, of 9.03x1023 molecules of methanol, CH;OH? (CH3OH: 32.04 g/mol)
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(b) How many kilojoules of heat are absorbed when 24.0 g CHA(g) is produced at constant pressure?
(CH4: 16.04 g/mol)
2CH;OH(g) → 2CH4(g) + O2(g)
AH = +252.8 kJ
(c) Methanol, CH3OH, boils at 65°C. What is the enthalpy change during the process in which 16.0 g of
liquid methanol at 25 °C is heated to gaseous methanol at 65 °C? (Specific heat of liquid CH3OH: 2.53
J/g°C; AH(CH3OH): 35.2 kJ/mol; CH;OH: 32.04 g/mol)
Transcribed Image Text:Constants: R:0.08206 atm. L/mol. K, Avogadro's Number (NA=6.022x1023 mol1) Q1. (a) What is the mass, in grams, of 9.03x1023 molecules of methanol, CH;OH? (CH3OH: 32.04 g/mol) www (b) How many kilojoules of heat are absorbed when 24.0 g CHA(g) is produced at constant pressure? (CH4: 16.04 g/mol) 2CH;OH(g) → 2CH4(g) + O2(g) AH = +252.8 kJ (c) Methanol, CH3OH, boils at 65°C. What is the enthalpy change during the process in which 16.0 g of liquid methanol at 25 °C is heated to gaseous methanol at 65 °C? (Specific heat of liquid CH3OH: 2.53 J/g°C; AH(CH3OH): 35.2 kJ/mol; CH;OH: 32.04 g/mol)
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