The reaction is presented by
C + O2 ==> CO2
The enthalpy of formation of CO2 is <span>–393.5 kJ/mol
We are asked for the enthalpy change of the reaction
Hr = Hf CO2 - (Hf C + Hf O2)
Since C and O2 are elements, their enthalpies of formation is 0
So,
Hr = -393.5 - 0
Hr = </span>–393.5 kJ/mol
Answer:
A
Explanation:
We can use the heat transfer equation:
Therefore:
In conclusion, the answer is A.
Note: Assuming that the reaction took place in the water, the heat released by the reaction should be positive instead of negative. Because the temperature of the water decreased, the reaction is endothermic. Hence, the water lost heat (what we calculated above) while the reaction absorbed heat. The heat released (or, rather, <em>absorbed)</em> by the reaction is thus +27,112 J. However, for the purposes of this question, A is the best choice.
Answer:
Dwarf planets do not travel around the Sun. ... Unlock all answers ... Dwarf planets do not have enough mass and gravity to be nearly round. Dwarf planets have not cleared other objects out of their orbital paths. ... 2039471 is waiting for your help. ... You might be interested in Everyone knows that Earth, Mars and Jupiter are planets. But both Pluto and Ceres were once considered planets until new ... It must be big enough to have enough gravity to force it into a ... It must be big enough that its gravity cleared away any other objects of a similar size near its orbit around the Sun.A planet is a large space body which reflects the light of a star around which it revolves. The planets in our solar system are classified as inner planets and outer planets ... Consequently, you will find craters of varying sizes on the inner planets and ... an object must be in orbit around the Sun, have enough mass so that it has
Explanation:
Answer The ethanol is stabilized by strong intermolecular forces between the molecules.wer:
Explanation:
During the phase change represented by the heat of fusion the temperature does not change. The molecules in the liquid state has a higher degree of freedom but are stabilized by the strong hydrogen bonding requiring a larger into of energy to separate the molecules than the heat of fusion.
The correct answer would be C, vacuole.
