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KiRa [710]
3 years ago
9

The tip of a pinwheel is 0. 24 m from the center. The pinwheel spins 5 times each second. What is the tangential speed of the ti

p of the pinwheel? 0. 30 m/s 1. 2 m/s 1. 5 m/s 7. 5 m/s.
SAT
1 answer:
balu736 [363]3 years ago
7 0
When a body is moving in circular path at a
distance r from its center its velocity at any
instant will be directed tangentially. This is
what we call tangential velocity. It is
calculated as follows:
Vt=r(w)
where w = 5 rev/s (2m rad / rev) = 31.42
rad/s
Vt = 0.24(31.42) = 7.5 m/s
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The kilojoules of heat that would be liberated by the condensation of 5. 00 g of acetone is 2.612 kJ.

<h3>What is the molar heat of vaporization?</h3>

The molar heat of vaporization is the amount of energy required to convert one mole of a chemical substance from the liquid to the gaseous phase provided that the temperature and pressure are constant.

From the given parameters:

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Therefore, the amount of heat that would be liberated by the condensation of 5.00 g of acetone is:

\mathbf{ =\dfrac{ 5.00 g}{58 \ g/mol } \times 30.3 \ kJ/mol }

= 2.612 kJ

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