Its all the way round true 99.9% sure because they launch baometers up in the air and it reflects off of the satalght
Answer:
-138.9 kJ/mol
Explanation:
Step 1: Convert 235.8°C to the Kelvin scale
We will use the following expression.
K = °C + 273.15 = 235.8°C + 273.15 = 509.0 K
Step 2: Calculate the standard enthalpy of reaction (ΔH°)
We will use the following expression.
ΔG° = ΔH° - T.ΔS°
ΔH° = ΔG° / T.ΔS°
ΔH° = (-936.92kJ/mol) / 509.0K × 0.51379 kJ/mol.K
ΔH° = -3.583 kJ (for 1 mole of balanced reaction)
Step 3: Convert -9.9°C to the Kelvin scale
K = °C + 273.15 = -9.9°C + 273.15 = 263.3 K
Step 4: Calculate ΔG° at 263.3 K
ΔG° = ΔH° - T.ΔS°
ΔG° = -3.583 kJ/mol - 263.3 K × 0.51379 kJ/mol.K
ΔG° = -138.9 kJ/mol
The temperature change is 96.9 °C
Using Q = mcΔT where Q = quantity of energy applied = 250 J, m = mass of gold = 20 g, c = specific heat capacity of gold = 0.129 J/g °C and ΔT = temperature change
Since we require the temperature change, making ΔT subject of the formula, we have
ΔT = Q/mc
substituting the values of the variables into the equation, we have
ΔT = 250 J/(20 g × 0.129 J/g °C)
ΔT = 250 J/(2.58 J/°C)
ΔT = 96.89 °C
ΔT ≅ 96.9 °C
So, the temperature change is 96.9 °C
Learn more about temperature change here:
brainly.com/question/16384350
Answer:
Na on the periodic table is sodium.
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