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81 solutions

Internal Energy

Q. A chemical reaction is carried out in a sealed container at constant pressure of 3.25 atm. The initial volume of the container is 1.78 L and the final volume is 3.19 L. Determine the value of w.

Solved • Apr 5, 2020

Internal Energy

Q. A gas cylinder with a movable piston that is filled with argon gas experiences a drop in temperature from 56.0 ˚C to 14.2 ˚C and the piston’s leaky seal loses 0.0048 mols of its initial 0.0132 mols before getting plugged. All of this transpires under a constant pressure of 1.024 atm. The initial volume of the cylinder was 13.0 L. How many calories were transferred through work? The total energy change for this process was 0.5983 kJ. How many joules of energy were transferred thermally?

Solved • Apr 2, 2020

Internal Energy

Q. Two gasses are sealed in a heavy-duty industrial balloon under a constant atm pressure of 1.03 atm. The two gasses react, releasing 149.0 calories of energy into its surroundings. The rxn raises the temp of the balloon from 23.0 ˚C to 32.0 ˚C. If the total moles of gas in the balloon increases from 0.0102 mols to 0.0548 mols, how many kJ of thermal energy were released in to the surroundings? If balloon’s initial volume was 1.0 L, how many joules energy are transferred through work?

Solved • Mar 31, 2020

Internal Energy

Q. Calculate the work associated with the expansion of a gas from 42.0 L to 79.0 L at a constant pressure of 13.0 atm. A. 546 L•atm B. 481 L•atm C. -481 L•atm D. -1.03 x 10^3 L•atm E. 1.03 x 10^3 L•atm

Solved • Mar 30, 2020

Internal Energy

Q. Calculate the work for the expansion of CO2 from 1.0 to 3.0 liters against a pressure of 1.0 atm at constant temperature. A. 3.0 L•atm B. 0 L•atm C. -3.0 L•atm D. 2.0L•atm E. -2.0 L•atm

Solved • Mar 30, 2020

Internal Energy

Q. What is the change in internal energy of a system that has 682 J of work done on it and gives off 485 J of heat? A. -682 J B. +682 J C. +1167 J D. -197 J E. +197 J

Solved • Mar 30, 2020

Internal Energy

Q. A block of CO2 weighing 15.0 g evaporates in a balloon at STP. The balloon fills to 5.00 L. The enthalpy of sublimation for CO2 is 25.1 kJ/mol. What total energy in kJ is available from the sublimation of dry ice in kJ?

Solved • Mar 28, 2020