Do you know Thermo?
Quiz by Natalie Wieland
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15 questions
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- Q1A hot object is placed into a beaker of cold water, which of the following is true...heat is transferred from the water to the object until the reach the same temperatureheat is transferred from the object to the water until they reach the same temperatureheat is transferred from the object to the water until their change in temperature is the sameheat is transferred from the water to the object until their change in temperature is the same60s
- Q2In the q = m C delta T equation, the m stands formolaritymolesmassvolume30s
- Q3If you preform a chemical reaction, why/how do you get a q?because the two reactants are at different temperaturesthere is no q for a reactionyou need more informationbecause the reaction overall gains or loses energy from or to the surroundings60s
- Q4How is q different than delta H?they are very differentdelta H is a heat energy ratio constant for a reaction, while q is heat energy specific for amounts reacted.They are the samedelta H is an endothermic process, while q is an exothermic process60s
- Q5If a student is doing a reaction in a test tube, and the test tube starts to feel cold, the reaction is...enthalpyyou need more informationexothermicendothermic60s
- Q6For the reaction: 34kJ + N2 + 3H2 --> 2NH3, the reaction isexo with a delta H of -34kJ/molendo with a delta H of -34 kJ/molendo with a delta H of + 34kJ/molexo with a delta H of +34 kJ/mol60s
- Q7For the reaction, CH4 + 2O2 ---> CO2 + 2H2O the delta H is -50kJ/mol. If four moles of oxygen react, how much heat would be released?25 kJ50 kJ100 kJyou need more information to calculate60s
- Q8For the reaction, CH4 + 2O2 --> CO2 + 2H2O the delta H is -50kJ/mol. If you want the reaction to produce 200 kJ of heat, how many moles of CH4 should you react with excess O2?241you need more information to calculate this60s
- Q9If CH4 + 2O2 --> CO2 + 2H2O has a delta H of -50kJ/mol. What would be the delta H for this reaction: 3CO2 + 6 H2O --> 3CH4 + 6 O2+ 150 kJ/mol+50- 150 kJ/molyou need more information to answer this60s
- Q10For the reaction, N2(g) + 3H2(g) --> 2NH3(g), predict the sign of the delta S.positiveneed more information to solve thisnegativezero60s
- Q11Which of the following values is zero for elements and diatomicsentropyheat of formationentropy and heat of formationneither entropy nor heat of formation60s
- Q12Nature favorsnegative delta S and positive delta Hnegative delta S and negative delta Hpositive delta S and positive delta Hpositive delta S and negative delta H60s
- Q13For a reaction to be spontaneous, you need which signnegative delta Gnegative delta Hpositive delta Spositive delta G60s
- Q14A reaction has a positive delta H and a negative delta S, when will this reaction be spontaneous?at high tempsneveralwaysat low temps60s
- Q15A reaction has a delta H of +50.0 kJ/mol, a delta S of +130J/mol K. At 298 Kelvin, will this reaction be spontaneous?no, you have a negative delta GNo, you have a positive delta Gyes, you have a negative delta Gyes, you have a positive delta G120s