How do you answer #5? NAME 5. (3 points) A piston is heated so that the gas insi

Question

How do you answer #5? NAME 5. (3 points) A piston is heated so that the gas inside of it expands. 150.0 kJ of heat are transferred to the piston, and it does 100.0 kJ of work. What is the change in energy of the piston? 6. (4 points) How many molecules are in 21.0 g of CO.? Answer in individual Moiecuies COl.co a. 87x I10 molecules, not moles 4eg co2 1mol.co1 moiecwies (6 points) Balance the following equations. Where only one of a species is present, write"I" -Do not leave spaces blank 7. 2C 2 28 60 2H 30 6o aH 12 3o 2 At i 80

Explanation / Answer

5)

Q = +150.0 KJ (positive because heat is added to the system)

W = -100.0 KJ (negative because work is done by system)

use:

delta E = Q + W

= 150.0 KJ - 100.0 KJ

= 50.0 KJ

Answer: 50.0 kJ

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