Mariaisagon9050
22.12.2020 •
Chemistry
Why do you think that Mercury and Mars have the same gravitational acceleration, but different masses?
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Ответ:
Explanation:
Why objects of different masses accelerate at the same speed under gravity [closed] If you push massive object it accelerates slowly compared to object which is of same size but less density/mass. However, all objects do Accelerate at the same rate.
Ответ:
a. Exotérmica
b. Exotérmica
c. Endotérmica
Explanation:
Las reacciones exotérmicas son aquellas que liberan calor al ambiente. Como consecuencia la temperatura final del sistema aumenta. Podemos reconocerlas porque el calor aparece como un producto.Las reacciones endotérmicas son aquellas que absorben calor del ambiente. Como consecuencia la temperatura final del sistema disminuye. Podemos reconocerlas porque el calor aparece como un reactivo.a. La combustión del propano:
C₃H₈ (g)+ 5 O₂(g) ⇒ 3 CO₂(g) + 4 H₂O(g) + 531 kcal
La reacción es exotérmica por lo que el calor aparece como producto.
b. La formación de la sal de mesa:
2 Na(s) + Cl₂(g) ⇒ 2 NaCl(s) + 196 kcal
La reacción es exotérmica por lo que el calor aparece como producto.
c. La descomposición del pentacloruro de fósforo:
PCl₅(s) + 16 kcal ⇒ PCl₃(s) + Cl₂(g)
La reacción es endotérmica por lo que el calor aparece como reactivo.