C6HW10a_4 - View Attempt Vie Attempt 4 of unlimited T it le...

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12/18/11 View Attempt 1/4 learn.uh.edu/webct/urw/«/ViewStudentAttempt.dowebct?attempt=5040079« VieZ Attempt 4 of unlimited Title: C6HW10a Started: November 8, 2011 2:01 PM Submitted: November 8, 2011 2:36 PM Time spent: 00:34:22 Total score: 8/10 = 80% Total score adjusted by 0.0 Maximum possible score: 10 Done 1. Thermal decomposition of rail car load of limestone to lime and carbon dioxide requires 4.79 x 10 6 kJ of heat. Convert this energy to calories. Express your answer in scientific notation: 1.25 x 10 3 = 1.25E3 with 3 significant figures. 1 cal = 4.184 J Student Response Correct AnsZer AnsZer: 1.15e6 1.14E9 (1.14 î 10 9 ) Score: 0/1 2. Which would decrease the internal energy of your body? Student Response Correct AnsZer A. lying in the sun B. sitting in an air conditioned classroom where its COLD C. taking a hot bath D. eating food E. None of these Score: 1/1 3. What is the change in internal energy (in J) of a system that releases 529 J of thermal energy to its surroundings and has 237 cal of work done on it? Calculate to zero decimal places and do not enter units with your answer.
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