The temperature change if 400 J of energy is added to 10 grams of water is 9.57°C.
<h3>How to calculate temperature change?</h3>
The temperature change of a calorimeter can be calculated using the following expression:
E = mc∆T
Where;
- E = energy in joules
- m = mass
- c = specific heat capacity = 4.18J/g°C
- ∆T = change in temperature
400 = 10 × 4.18 × ∆T
400 = 41.8∆T
∆T = 400/41.8
∆T = 9.57°C
Therefore, the temperature change if 400 J of energy is added to 10 grams of water is 9.57°C.
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Independent variables don't change
Dependent variables change as a result of the alteration made during the experiment
From the calculation, the partial pressure of Cl2 is 1.98 atm. Option B
<h3>What is the equilibrium constant?</h3>
The term equilibrium constant refers to the value that shows us the extent to which reactants are converted into products. We know that the equilibrium constant can only be obtained by the use of the equilibrium partial pressures of each of the species.
Thus we have;
K = p PCl3 . pCl2/pPCl5
p PCl3 = partial pressure of PCl3
pCl2 = partial pressure of Cl2
pPCl5 = partial pressure of PCl5
K = equilibrium constant
Substituting values;
1.05 = 0.463 * pCl2/0.875
pCl2 = 1.05 * 0.875/0.463
pCl2 = 1.98 atm
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Answer:
C
Explanation:
an index fossil is a fossil from a very short-lived, geographically widespread species known to exist during a specific interval of geological time.
Answer:
mass of CO₂ = 5.402 g
Explanation:
At STP, 1 mole of any gas takes up 22.4L of volume
Thus, 1 mole = 22.4 L
1 L = 1 mole ÷ 22.4
Therefore, 2.75 L = 2.75 mole ÷ 22.4 = 0.123 moles
Molecular weight of CO₂ = 44 g/mole
mass of CO₂ = molecular weight * number of moles = 44 g/mole * 0.123 moles
mass of CO₂ = 5.402 g
