Answer:
ΔHrxn = 41.3 kJ
Explanation:
Let's consider the following equation.
CO₂(g) + H₂(g) ⇒ CO(g) + H₂O(g)
When 16.4 g of CO₂ react 15.4 kJ of energy are absorbed. In the balanced equation, there is 1 mole of CO₂, so we have to calculate the heat absorbed per mole of CO₂. Taking into account that the molar mass of CO₂ is 44.01 g/mol, the enthalpy of reaction (ΔHrxn) is:
The correct answer is (C. zirconium - 93.
Metallic luster is not a characteristic common to all minerals.
The amount of energy that was used to heat Cu is 27.6 cal
<u><em>calculation</em></u>
Heat (Q) = M ( mass) x c(specific heat capacity) x ΔT( change in temperature)
where;
Q=?
M = 5.0 g
C=0.092 cal/g°C
ΔT = 80°c-20°c=60°C
Q is therefore = 5.0 g x 0.092 cal / g°c x 60°c =27.6 cal
Both the Sun and the Earth are sources of heat that power an interconnected set of dynamic systems (lithosphere, hydrosphere & cryosphere, atmosphere, biosphere).
Within the Sun, heat is transferred by radiation and convection, which involves circulation of hydrogen ions. Within the Earth heat is transferred by conduction and convection, which involves circulation of silicates in the mantle and the crust, and by the circulation of iron in the liquid outer core. On the surface of the Earth and the atmosphere, heat emanating largely from the Sun is transferred by convection, which involving the circulation of water and carbon. Both the Sun and the Earth and their atmospheres are layered. Both systems evolve and change.
