(Answered) Atoy helium balloon is initially at a temperature of t

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A toy helium balloon is initially at a temperature of T = 20^o C. Its initial volume is 0.0042 m³ (It is a 10 cm radius sphere). Assume that the pressure in the balloon always equals atmospheric pressure, 101.3 kPa.

1) The balloon is lying in the sun, which causes the volume to expand by 6%. What is the new temperature,

T = ?

2) By how many Joules did the internal energy of the gas in the balloon increase?

ΔU = ?

3) How much work was done by the gas during the expansion? (It's a positive number.)

W_by =

4) How much heat was added to the gas by the Sun?

Q =

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