silver oxide, ag2o, when heated, strongly decomposes to yield silver and oxygen

Question

silver oxide, ag2o, when heated, strongly decomposes to yield silver and oxygen gas. a 4.262 g sample was heated to decompose it completly. what volume, in in ml, should the gas collected occupy at 28.3oc and 749.0 torr if it behaves as an ideal?
silver oxide, ag2o, when heated, strongly decomposes to yield silver and oxygen gas. a 4.262 g sample was heated to decompose it completly. what volume, in in ml, should the gas collected occupy at 28.3oc and 749.0 torr if it behaves as an ideal?
5. Dissolving 5.0 g of CaC12(s) in 150.0 g of water in a calorimeter at 22.4°C causes the temperature to rise to 27.8 °C. What is the approximate amount of heat involved in the dissolution, assuming the heat capacity of the resulting solution is 4.18 Jig C? Is the reaction exothermic or endothermic? (3 pts) 10/14/17,12 00 AM Page 1 of 2 https://blackboard iree.edu/bbcswebdav/pid . 3 794724-dt-conte../Activities/201 71 CHIM45 Thermochemistry%2OProblems. docx

Explanation / Answer

-Qsolution= Qcal

-Qsoln = m*C*(Tf-Ti)  

-Qsoln = 150*4.18*(27.8-22.4) = 3385.8 J

Qsoln = -3385.8 J

Hsoln = Qsoln/n

n= mass/MW = 5/110.98 = 0.0450

HSoln = (-3385.8 ) /(0.0450) = -75240 J/mol = -75.24 kJ/mol

this must be exothermic, since it releases heat

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