We are going to use this formula:
Q = M*C*ΔT
when Q is the heat required
M is the mass of CCl4 = 10.35 g
C is the specific heat capacity of CCl4 = 0.874J/g.c
and ΔT the change in temperature = 56.4 - 32.1 °C =24.3 °C
∴ Q = 10.35g * 0.874 * 24.3 °C
= 219.8 J
The answer is- The order of decreasing potential energy is :
The potential energy can be expressed as the static energy that is stored in the chemical bonds.
What is the trend of potential energy in an exothermic reaction and an endothermic reaction?
- During an exothermic reaction, heat is released and the stored potential energy of bonds is converted into the kinetic energy and thus there is a decrease in the potential energy during an exothermic reaction.
- During an endothermic reaction, heat is absorbed during the reaction and this heat is stored as potential energy in bond, hence the potential energy increases during a endothermic reaction.
- Now, during this reaction, basic Magnesium hydroxide, reacts with acidic , thus this reaction is an exothermic reaction.
- Hence, the potential energy of products is less than the potential of reactants.
- Next, the potential energy of solids are always more than the potential energy of gases.
- Therefore, the decreasing order of potential energy is
[H2O is not considered]
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Answer:
The coefficients are 2 for H₂O and 1 for Ca(OH)₂.
Explanation:
Let's consider the following reaction.
Ca(OH)₂(aq) + 2 HCl(aq) → CaCl₂(aq) + 2 H₂O(l)
According to the balanced equation, the molar ratio of H₂O to Ca(OH)₂ is 2:1. Using this conversion factor, we have the following proportion:
moles Ca(OH)₂. (2 mol H₂O ÷ 1 mol Ca(OH)₂) = moles H₂O
Answer:
The molarity of the acid HX is 6.0 M.
Explanation:
We determine the amount of moles of KOH used to neutralize the acid:
=0.12 moles KOH
Then, we calculate the amount of moles of acid:
0.12 moles KOH×=0.12 moles HX
The molarity of HX is:
=6.0 M
The term absolute zero is given because the volume and the temperature comes to 0. So according to Charles law,
<span>At const K temp, </span><span>Volume is proportional to Temperature. </span>So the volume is also 0. <span>P = nRT/V. </span><span>T=0 and P=0</span>