C6HW10a_10 - 12/18/11 View Attempt Vie T Attempt 10 of...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: 12/18/11 View Attempt Vie T Attempt 10 of unlimited : S C 6HW10a : S N N : T : 17, 2011 4:18 PM 17, 2011 4:18 PM 00:00:03 Total score: 0/10 = 0% T 0.0 M : 10 Done 1. T 4.1 (C . 103 C I ) 1850 J/ 1 , ( .O ) 9 ? 1 = 4.184 J. C . Student Response C orrect Ans er Ans er: S 83.5 : 0/1 2. T . Student Response C orrect Ans er A. T B. F S : 0/1 3. A 691 J ( 4,763 J J)? C .W . Student Response Ans er: S : C orrect Ans er - 4,072 0/1 4. W 635 J 249 J ? learn.uh.edu/webct/urw/ /ViewStudentAttempt.dowebct?attempt=5138563 1/4 12/18/11 View Attempt Student Response C orrect Ans er A. 635 J B. 884 J C. - 635 J D. - 386 J E. 386 J Sc ore: 0/1 5. Et hylene glyc ol, used as a c oolant in aut omot ive engines, has a spec if ic heat c apac it y of 2.42 J/(g·K). Calc ulat e q when 3.65 kg of et hylene glyc ol is c ooled f rom 132°C t o 85°C. Student Response C orrect Ans er 1. - 1900 kJ 2. - 420 kJ 3. - 99 kJ 4. - 0.42 kJ Sc ore: 0/1 6. A 30.5- g sample of an alloy at 93.0°C is plac ed int o 50.0 g of wat er at 22.0°C in an insulat ed c of f ee c up wit h a heat c apac it y of 9.2 J/K. If t he f inal t emperat ure of t he syst em is 31.1°C, what is t he spec if ic heat c apac it y of t he alloy? spec if ic heat c apac it y of wat er = 4.184 J/(g. °C) Student Response C orrect Ans er A. 0.53 J/g·°C B. 6.1 J/g·°C C. 3.0 J/g·°C D. 1.1 J/g·°C E. None of t hese is wit hin 5% of t he c orrec t answer Sc ore: 0/1 7. Whic h set c ont ains only t he F ALSE st at ement (s)in t he group below? a. F or t he f reezing of liquid wat er is posit ive. b.F or a general exot hermic reac t ion is posit ive. c . F or t he c ombust ion of 1 mol of met hane in oxygen is negat ive. Student Response C orrect Ans er A. a. only B. b. only learn.uh.edu/webct/urw/ /ViewStudentAttempt.dowebct?attempt=5138563 2/4 12/18/11 View Attempt C. c . only D. a. and b. E. a., b., and c . Sc ore: 0/1 8. If t he spec if ic heat of wat er is 4.180 J , what mass of wat er c an be heat ed f rom 5.0 C t o 80.0 C by 27.0 kJ of heat ? Student Response C orrect Ans er A. 0.0861 g B. 76.0 g C. 276 g D. 86.1 g E. 8.61 g Sc ore: 0/1 9. When 40.0 mL of 0.200 M HCl at 21.5 C is added t o 40.0 mL of 0.200 M NaOH also at 21.5 C in a c of f ee- c up c alorimet er, t he t emperat ure of t he result ing solut ion rises t o 22.8 C. Assume t hat t he volumes are addit ive, t he spec if ic heat of t he solut ion is and t hat t he densit y of t he solut ion is Calc ulat e t he ent halpy c hange, H in kJ f or t he reac t ion: Student Response C orrect Ans er A. - 54.3 kJ B. - 435 kJ C. +21.5 kJ D. +48.6 kJ E. +435 kJ Sc ore: 0/1 10. Based on t he f ollowing equat ions: learn.uh.edu/webct/urw/ /ViewStudentAttempt.dowebct?attempt=5138563 3/4 12/18/11 View Attempt Det ermine t he ent halp c hange ( H) f or t he f ollowing reac t ion: Student Response C orrect Ans er A. 393.5 kJ/mol B. - 393.5 kJ/mol C. 172.5 kJ/mol D. 345.0 kJ/mol E. - 787.0 kJ/mol Sc ore: 0/1 Done learn.uh.edu/webct/urw/ /ViewStudentAttempt.dowebct?attempt=5138563 4/4 ...
View Full Document

Ask a homework question - tutors are online