Page 21 - Surviving Chemistry BFF Homework Helper and Test Prep Preview

Questions for Regents Practice Matter, Energy & Changes
Parts A and B-1 Multiple Choice

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14. How much heat is needed to change a 5.0 gram sample of water from 65 C to 75 C?
1) 210 J 2) 14 J 3) 21 J 4) 43 J

15. A 2.0 L sample of O2(g) at STP had its volume changed to 1.5 L. If the temperature
of the gas was held constant, what is the new pressure of the gas in kilopascals?
1) 3.0 kPa 2) 152 kPa 3) 101.3 kPa 4) 135 kPa

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16. A gas occupies a volume of 6 L at 3 atm and 70 C. Which setup is correct for

calculating the new volume of the gas if the temperature is changed to 150 C and
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the pressure is dropped to 1.0 atm?

3 x 150 3 x 423
1) 6 x ---------------- 3) 6 x ---------------
1 x 70 1 x 343

3 x 80 3 x 343
2) 6 x --------------- 4) 6 x ---------------

1 x 150 1 x 423

17. The graph to the right represents

the relationship between

temperature and time as heat is
added at a constant rate to a

substance, starting when the

substance is a solid below its

melting point.

During which time period (in

minutes) does the substance’s

average kinetic energy

remain the same?

1) 0 – 1 2) 1 – 3 3) 3 – 5 4) 9 – 10

18. Given the balanced particle-diagram equation:

Which statement describes the type of change and the chemical properties of the

product and reactants?

1) The equation represents a physical change, with the product and reactants having
different chemical properties.
2) The equation represents a physical change, with the product and reactants having
identical chemical properties.

3) The equation represents a chemical change, with the product and reactants having
different chemical properties.
4) The equation represents a chemical change, with the product and reactants having
identical chemical properties.

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