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Expansion of gas at constant pressure

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A balloon contains 10 liters of helium gas at 17 degrees C and 0.99 atm. How much energy must be added to raise the temperature of the helium to 37 degrees C while allowing the balloon to expand and stay at the same pressure.

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This solution provides a detailed, step-by-step tutorial explaining how to determine the energy needed to raise the temperature of helium by a given number of degrees.

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A balloon contains 10 liters of helium gas at 17.0^O C and 0.99 atm. How much energy must be added to raise the temperature of the helium to 37.0^O C while allowing the balloon to expand and stay at the same pressure?

Solution: Initial Volume V_1 = 10 liters = 10 x 0.001 m^3 = 0.01 m^3
Initial temperature T_1 = 17 + 273 = 290 K
Initial pressure P_1 = 0.99 atm = 0.99 x 1.013 x 10^5 Pa = 10^5 Pa
Final ...

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