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MAVERICK [17]
3 years ago
7

Can someone help me with all of those pls!!!!

Chemistry
1 answer:
Nina [5.8K]3 years ago
4 0
1. Rotates
2. Solar eclipse
3. You can sometimes
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The heat capacity of air is much smaller than that of water, and relatively modest amounts of heat are needed to change its temp
LekaFEV [45]

Answer:

Q=9.2x10^5J

t=614s=10.2min

Explanation:

Hello,

In this case, we can compute the energy by using the following formula for air:

Q=nCp\Delta T

Whereas the moles of air are computed via the ideal gas equation at room temperature inside the 5.5m x 6.5m x 3.0m-room:

n=\frac{PV}{RT}\\\\V=5.5m*6.5m*3.0m=107.25m^3*\frac{1000L}{1m^3}=107250L\\ \\n=\frac{1atm*107250L}{0.082\frac{atm*L}{mol*K}*298.15K}\\ \\n=4386.8mol

Now, we are able to compute heat, by considering that the temperature raise is given in degree Celsius or Kelvins as well:

Q=4386.8mol*21\frac{K}{mol*K}*10K \\\\Q=9.2x10^5J

Finally, we compute the time required for the heating by considering the heating rate and the required heat, shown below:

t=\frac{9.2x10^5J}{1.5\frac{kJ}{s}*\frac{1000J}{1kJ} } \\\\t=614s=10.2min

Regards.

8 0
3 years ago
...............................................<br> .
Sergio [31]

Answer:

yuh

Explanation:

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