Description This is exam 3 which covers chapters 5 & 6 as well as few questions
ID: 975492 • Letter: D
Question
Description This is exam 3 which covers chapters 5 & 6 as well as few questions from previous chapters. The password for the exam is UnithreeExam. Instructions For your exam, you have 50 questions with a time limit if 1 hour and 30 minutes. The exam is worth 200 points. You will only have one attempt for the exam. When started, you will be complete it in one setting. Please mad instructions and answers carefully. The due date for the exam is Sunday. April 24th at 11:59 p.m. After this date and time, the exam will be Timed Test This Test has a time limit of 1 hour and 30 minutes. This test will save and submit automatically when the time expires. Warnings appear when half the time, 5 minutes, 1 minute, and 30 seconds remain Multiple accepts Not allowed. This test can only be taken once A 86.7 gram aluminum block initially at 40.6 degree C absorts 500 J of heat. What is the final temperature (in C) of the aluminum? (The specific heat capacity of aluminum is 0.903 J[g.c]).Explanation / Answer
Q = mc (t2-t1)
t1 =initial temperature = 40.6 oC
t2 = final temperature =
mass of aluminium block m = 86.7 g
specific heat capacity of Al , c = 0.903 J/g/oC
heat absorbed Q = 500 J
Hence,
Q = mc (t2-t1)
500 J = 86.7 g x 0.903 J/g/oC x ( t2- 40.6 oC)
On simplication,
t2 = 46.98 oC
Therefore,
final temperature of the aluminium = 46.98 oC