Answer:
A. 8600 J
General Formulas and Concepts:
<u>Thermochemistry</u>
Specific Heat Formula: q = mcΔT
- q is heat (in J)
- m is mass (in g)
- c is specific heat (in J/g °C)
- ΔT is change in temperature (in °C)
Explanation:
<u>Step 1: Define</u>
[Given] <em>m</em> = 1600 g
[Given] ΔT = 214 °C - 202 °C = 12 °C
[Given] <em>c</em> = 0.450 J/g °C
[Solve] <em>q</em>
<u>Step 2: Find Heat</u>
- Substitute in variables [Specific Heat Formula]: q = (1600 g)(0.450 J/g °C)(12 °C)
- Multiply [Cancel out units]: q = (720 J/°C)(12 °C)
- Multiply [Cancel out units]: q = 8640 J
<u>Step 3: Check</u>
<em>Follow sig fig rules and round. We are given 2 sig figs as our lowest.</em>
8640 J ≈ 8600 J
Topic: AP Chemistry
Unit: Thermodynamics
The far more common hydrogen isotope, protium, has NO neutrons in the nucleus.
So your answer is C. 0
The height it's falling, wind pressure, force, the weight of the object etc
Convection currents in the mantle are what causes the movement of tectonic plates. As the extremely hot molten material from the mantle rises toward the crust, it cools enough to become denser and sink back into the hotter area of the mantle.
Answer: 2232 torr
Explanation:
Combined gas law is the combination of Boyle's law, Charles's law and Gay-Lussac's law.
The combined gas equation is,
![\frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2}](https://tex.z-dn.net/?f=%5Cfrac%7BP_1V_1%7D%7BT_1%7D%3D%5Cfrac%7BP_2V_2%7D%7BT_2%7D)
where,
= initial pressure of gas = 750 torr
= final pressure of gas = ?
= initial volume of gas = 36.0 L
= final volume of gas = 15.0 L
= initial temperature of gas = ![10^oC=273+10=283K](https://tex.z-dn.net/?f=10%5EoC%3D273%2B10%3D283K)
= final temperature of gas = ![78^oC=273+78=351K](https://tex.z-dn.net/?f=78%5EoC%3D273%2B78%3D351K)
Now put all the given values in the above equation, we get:
![\frac{750\times 36}{283}=\frac{P_2\times 15.0}{351}](https://tex.z-dn.net/?f=%5Cfrac%7B750%5Ctimes%2036%7D%7B283%7D%3D%5Cfrac%7BP_2%5Ctimes%2015.0%7D%7B351%7D)
![P_2=2232torr](https://tex.z-dn.net/?f=P_2%3D2232torr)
The pressure will be 2232 torr if the volume changes to 15.0 L and the temperature changes to 78 °C, if the amount of gas stays the same.