Chemistry
Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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**Chemical Reaction Analysis** Consider the following chemical reaction: \[ 2 \, \text{CH}_3\text{OH}(g) \rightarrow 2 \, \text{CH}_4(g) + \text{O}_2(g) \] \[\Delta H = +252.8 \, \text{kJ}\] **Question:** Is this reaction exothermic or endothermic? - [ ] Exothermic - [x] Endothermic **Explanation:** Since the enthalpy change (\(\Delta H\)) is positive, the reaction is endothermic, meaning it absorbs heat from the surroundings. **Calculation Task:** Calculate the amount of heat transferred when 24.16 g of \(\text{CH}_3\text{OH}\) is decomposed by this reaction at constant pressure. Please note: The solution involves using the molar mass of \(\text{CH}_3\text{OH}\) and applying stoichiometry to find the heat transferred based on the given \(\Delta H\).
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Transcribed Image Text:**Chemical Reaction Analysis** Consider the following chemical reaction: \[ 2 \, \text{CH}_3\text{OH}(g) \rightarrow 2 \, \text{CH}_4(g) + \text{O}_2(g) \] \[\Delta H = +252.8 \, \text{kJ}\] **Question:** Is this reaction exothermic or endothermic? - [ ] Exothermic - [x] Endothermic **Explanation:** Since the enthalpy change (\(\Delta H\)) is positive, the reaction is endothermic, meaning it absorbs heat from the surroundings. **Calculation Task:** Calculate the amount of heat transferred when 24.16 g of \(\text{CH}_3\text{OH}\) is decomposed by this reaction at constant pressure. Please note: The solution involves using the molar mass of \(\text{CH}_3\text{OH}\) and applying stoichiometry to find the heat transferred based on the given \(\Delta H\).
Calculate the amount of heat transferred when 24.0 g of CH₃OH is decomposed by this reaction at constant pressure. \[ \text{amount of heat transferred:} \_\_\_\_ \text{kJ} \] For a given sample of CH₃OH, the enthalpy change during the reaction is 537.8 kJ. What mass of methane gas is produced? \[ \text{mass of CH₄ produced:} \_\_\_\_ \text{g} \]
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Transcribed Image Text:Calculate the amount of heat transferred when 24.0 g of CH₃OH is decomposed by this reaction at constant pressure. \[ \text{amount of heat transferred:} \_\_\_\_ \text{kJ} \] For a given sample of CH₃OH, the enthalpy change during the reaction is 537.8 kJ. What mass of methane gas is produced? \[ \text{mass of CH₄ produced:} \_\_\_\_ \text{g} \]
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Step 1: Determine the given data

T h e space r e a c t i o n space i s space 2 C H subscript 3 O H left parenthesis g right parenthesis space rightwards arrow space 2 C H subscript 4 left parenthesis g right parenthesis space plus thin space O subscript 2 left parenthesis g right parenthesis space space space space space space space space space space increment H thin space equals space plus 252.8 space k J W e space h a v e space t o space d e t e r m i n e colon R e a c t i o n space i s space e x o t h e r m i c space o r space e n d o t h e r m i c A m o u n t space o f space h e a t space t r a n s f e r r e d space w h e n space 24.16 space g space o f space C H subscript 3 O H space i s space d e c o m p o s e d space M a s s space o f space C H subscript 4 space p r o d u c e d space i f space e n t h a l p y space c h a n g e space i s space 537.8 space k J thin space

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