SCIN 131 Quizzes (Questions with Solutions) 2023

SCIN 131 Quizzes (Questions with Solutions) 2023. Aluminum has a specific heat capacity that is about twice that of iron. To balls of each metal, both with the same mass, and that have an initial temperature of 95 degrees C, are dropped into a completely insulated container that has the same mass of water but an initial temperature of 30 degrees C. When thermal equilibrium is finally achieved (i.e. temperatures are no longer changing), which of these statements will be true? A.Both balls will reach the same final temperature B.The iron ball will reach a higher final temperature than the aluminum ball. C.The aluminum ball will reach a higher final temperature than the iron ball. D.The difference in the final temperatures of the balls depends on the initial mass of the water. E.The difference in the final temperatures of the balls depends on the intial temperature of the water. Answer Key: A Feedback: This is a specific heat capacity problem. No calculation needed, just an understanding of the concept. Question 7 of 12 4.0/ 4.0 Points `How should someone classify salt? A.mixture-homogeneous B.pure substance-compound C.mixture-heterogeneous D.pure substance-element E.none of the above Answer Key: B Question 8 of 12 4.0/ 4.0 Points `Chemical properties are: A.those that a substance displays without changing its composition. B.those that a substance displays only through changing its composition. C.identical for all solid matter. D.those that cause atoms and molecules to change. E.none of the above Answer Key: B Question 9 of 12 4.0/ 4.0 Points `A cube of copper and cube of zinc that have the same mass and same initial temperature have a certain amounf of heat (Q) removed from them. The final temperatures are different. What property causes this difference? A.density B.heat of vaporization C.specific heat capacity D.volume E.none of the above Answer Key: C Feedback: Good. This is simply an application of the specific heat equation. Question 10 of 12 4.0/ 4.0 Points `What is the value of 39°C on the Fahrenheit temperature scale? A.312.15 B.102.2 C.7 D.3.89 E.none of the above Answer Key: B Part 4 of 4 - 5.0/ 10.0 Points Question 11 of 12 0.0/ 5.0 Points `My cat weighs 37.0 lbs. Yes, she is a little large. I put her into a bathtub containing 47.0 gallons of water when filled to the very top. After I put her in, I collected all the water that ran over the side of the tub, and found it to be equal to 0.923 gallons. (A) What is the density of my cat in grams per cubic centimeter? (B) What if next time I do this she gains 4.0 lbs. and grows big enough to displace 1.10 gallons. Will she still have the same density? Explain and prove your answer. All work must be shown, labeled, and explained in detail to receive credit. Note that where applicable, superscripts (X2 ) can be written as X^2 and subscripts (X2) can be written as X_2 if it saves you time. Feedback: See section 2.9 Comment: Uh Oh! Did you run out of time? Make sure you pace yourself well so you can complete the quizzes.