2PbS s 3O 2 g 2PbO s 2SO 2 g Δ H 8274 kJ What mass of galena is converted to

# 2pbs s 3o 2 g 2pbo s 2so 2 g δ h 8274 kj what mass

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2PbS( s ) + 3O 2 ( g ) → 2PbO( s ) + 2SO 2 ( g ) Δ H = ­827.4 kJ What mass of galena is converted to lead oxide if 975 kJ of heat are liberated? 203 g 282 g 406 g 564 g A piece of copper metal is initially at 100.0° C. It is dropped into a coffee cup calorimeter containing 50.0 g of water at a temperature of 20.0° C. After stirring, the final temperature of both copper and water is 25.0° C. Assuming no heat losses, and that the specific heat (capacity) of water is 4.18 J/(g·K), what is the heat capacity (not spectific heat capacity) of the copper in J/K? 2.79 3.33 13.9 209 None of the above QUEST ION 5 0.5 points Save Answer Calculate the Δ rxn for the following reaction. Δ f [AsH 3 ( g )] = 66.4 kJ/mol; Δ f [H 3 AsO 4 ( aq )] = ­904.6 kJ/mol; Δ f [H 2 O( l )] = ­285.8 kJ/mol; H 3 AsO 4 ( aq ) + 4H 2 ( g ) → AsH 3 ( g ) + 4H 2 O( l ) ­685.2 kJ ­172.2 kJ 172.2 kJ 685.2 kJ QUEST ION 6 0.5 points Save Answer Which one of the following equations represents the formation reaction of CH 3 CH 2 OH( l )? 2C( g ) + 3H 2 ( g ) + ½½O 2 ( g ) → CH 3 CH 2 OH( l ) 2C( g ) + 6H( g ) + O( g ) → CH 3 CH 2 OH( l ) 2C( g raphite) + 6H( g ) + O( g ) → CH 3 CH 2 OH( l ) QUEST ION 7 0.5 points Save Answer

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2C(diamond) + 6H( g ) + O( g )→ CH 3 CH 2 OH( l ) 2C( g raphite) + 3H 2 ( g ) + ½O 2 ( g )→ CH 3 CH 2 OH( l ) Predict the sign of Δ for the following reaction.
• Fall '19
• 1 m, Oxide, 25°C, 282 g, 406 g, 2PbS

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