Answer:
Between 
and 
Explanation:
According to the second law of thermodynamics, heat flows from hotter objects toward colder objects.
Having a mixture of two components, one at a higher temperature of and the other one at a lower temperature of , heat will flow from the first object to the second one.
The temperature of the first object will decrease and the temperature of the second object will increase. Assuming no phase change, the final equilibrium temperature will be reached between and .
We cannot tell the exact temperature, unless we know the specific heat capacity of each material and their masses. The first object will give off heat given by:
The second object will gain this heat by:
Since the heat given off is equal to the heat gained:
Let's say that each object is water with a specific heat capacity of:
The mass of the first object is 10 g, the mass of the second one is 50 g, then:
The equation is simplified to:
False, carbon is an allotrope that can be in the forms of graphite, diamond etc
The chemical reaction is expressed as:
<span> 4KO2+2CO2→2K2CO3+3O2
</span>
We are given the amount of KO2 to be used in the reaction. This will be the starting point of our calculations. We do as follows:
0.425 mol KO2 ( 3 mol O2 / 4 mol KO2 ) = 0.319 mol O2 produced
Hope this answers the question. Have a nice day.
Answer:
There are 255, 85 grams of Strontium in 2,92 moles.
Explanation:
We perform a simple rule of three to calculate the number of grams, knowing that one mole of Sr weights 87, 62 grams:
1 mol Sr---------87, 62 grams
2,92 mol Sr-----x=(2,92 mol Sr x-87, 62 grams)/1 mol Sr= 255,8504 grams
V1 = 2.00 L
<span>T1 = 25 + 273 = 298 K </span>
<span>V2 = 6.00 L </span>
<span>T2 = ? </span>
<span>Assuming the pressure is to remain constant, then </span>
<span>V1/T1 = V2/T2 </span>
<span>T2 = T1V2/V1 = (298)(6)/(2) = 894 deg K</span>
