D. Leaves because leaves in a plant absorb the most sunlight
N(Ca)/2 = n(O)/1 = n(CaO)/2
The calcium and the Calcium Oxide are divided by 2 because of their coefficients
there is no number in front of the oxygen so it is over one.
Hope this helped!!
Answer:
1,620 J.
Explanation:
- The amount of heat added to a substance (Q) can be calculated from the relation:
<em>Q = m.c.ΔT.</em>
where, Q is the amount of heat released from ethanol cooling,
m is the mass of ethanol (m = 60.0 g),
c is the specific heat of ethanol in the liquid phase, since the T is cooled below the boiling point and above the melting point (c = 1.0 J/g °C),
ΔT is the temperature difference (final T - initial T) (ΔT = 43.0 °C – 70.0 °C = - 27.0 °C).
<em>∴ Q = m.c.ΔT</em> = (60.0 g)(1.0 J/g °C)(- 27.0 °C) = - 1620 J.
<em>The system releases 1620 J.</em>
Data Given:
Change in Entropy = ΔH = 120.5 kJ = 1.20 × 10⁵ J
Temperature = T = 298 K
Change in Entropy = ΔS = 758.2 J/K
Using Formula,
ΔG = ΔH - T ΔS
Putting Values,
ΔG = (1.20 × 10⁵ J) - (298 K × 758.2 J/K)
ΔG = -1.059 × 10⁵ J
ΔG = -105.94 kJ
