General Remark
The amount of energy transferred from the sun to the wood and steel is determined by m*c*deltaT. [So far, you really only have 2 choices for heat energy transfer. One is the one you are using m*c*deltaT and the other one is Mass * heat. This latter is for phase changes].
Solution
What causes the temperature to be higher in one part of the sample than on the other part? If they both receive the same amount of heat (as in getting their energy from the sun) then why does one deltaT exceed the other? Look around at the parts of the formula. That's very important in science. The mass (m) is not going to affect the different temperatures. The mass is the same in both cases.
It won't be deltaT either. DeltaT has already done it's job. It's recorded that there is a temperature difference. Steel has a larger deltaT than the wood.
What's left?
It must be the c. What are the units on c? If you check it out it is joules / (oC * grams) or something that means grams and deltaT. So c must be lower than steel than for wood. Why? Because it takes less energy to heat up the steel. Small c means large deltaT if the temperature is greater in the iron.
Answers
<em><u>Blank One </u></em>absorbed more energy from. c is small.
<em><u>Blank Two</u></em> Less than.
This is an extremely important question to get a handle on. More and Less are very important key words in Science.
Answer:
0.250 mol Mg²⁺
0.500 mol Cl⁻
Explanation:
Magnesium chloride (MgCl₂) dissociates into ions according to the following equilibrium:
MgCl₂ ⇒ Mg²⁺ + 2 Cl⁻
1 mol 1 mol 2 mol
1 mol of Mg²⁺ and 2 moles of Cl⁻ are formed per mole of MgCl₂. If we have 0.250 mol of MgCl₂, the following amounts of ions will be formed:
0.250 mol MgCl₂ x 1 mol Mg²⁺/mol MgCl₂= 0.250 mol Mg²⁺
0.250 mol MgCl₂ x 2 mol Cl⁻/mol MgCl₂= 0.500 mol Cl⁻
<u>Answer:</u> The standard change in Gibbs free energy for the given reaction is 4.33 kJ/mol
<u>Explanation:</u>
For the given chemical equation:
The expression of for the given reaction:
We are given:
Putting values in above equation, we get:
To calculate the standard Gibbs free energy, we use the relation:
where,
= standard Gibbs free energy
R = Gas constant =
T = temperature =
= equilibrium constant in terms of partial pressure = 0.174
Putting values in above equation, we get:
Hence, the standard change in Gibbs free energy for the given reaction is 4.33 kJ/mol
Answer:
mountains
Explanation:
A mountain can be defined as a land-form that has characteristics of high elevation and high relief. Mountains rise above the land and rise to form a peak. It is because of the high elevations that the climates are cooler in the mountainous regions as compared to the sea level. The mountains are elevated, have relief, and have steepness and continuity.
Answer:
four, different substances are produced.