An energy of 25kJ is given out hence the reaction is exothermic.
<h3>What is a reaction?</h3>
Chemical reaction is said to occur when reactants combine leading to the formation of products. In a plot of the energy against the reaction profile, the topmost point of the graph is called the activation energy.
We know that a reaction is exothermic when reactants posses more energy than the products. Hence the enthalpy change for this reaction is;
ΔH = 5kJ - 30kJ = -25kJ thus the reaction is an exothermic reaction.
Now, the activation energy for the lighting of the match stick is high that is why a spark is required before the reaction gets underway. Heat is evolved in the process hence the reaction is exothermic. The energy of the reactants is greater than the energy of the products.
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Answer:
Explanation:
Given
Electric Field Strength
Potential Difference between Plates is given by
In conducting plates a Potential difference exist between two plate which accelerate the charge when put between the conducting plates
The potential difference is given by
where E=Electric Field strength
d=distance between Plates
Answer:
The gas pressure is: 1.55 atm.
Explanation:
We need to use the equation that relate the variables given at the exercise (pressure, temperature and volume) from the ideal gas law formula, when the mass is constant we can reduce the expretion to solving to P2 we get: replace the values .
Answer:
Amplitude is one-half the height of the wave from peak to trough. Wavelength and frequency are inversely proportional: As the wavelength increases, the frequency decreases.
I hope this helps in a way...
<u>Answer
</u>
d. both the volume and the number of particles are constant.
<u>Explanation
</u>
Temperature increases the kinetic energy of the molecules. This increases the velocity of the molecules hence increasing the number of collisions with the walls of the container. This causes the pressure in the container to increase.
This will only happen if other factors are held constant. These factors are volume of the container and the number of particles/molecules.