The reaction C₂H₆+137kJ→C₂H₄+H₂ is endothermic since the energy is being absorbed by the reaction and not released. We know this by the fact that the energy is on the reactants side of the reaction. If the energy was on the products side of the reaction we would call it exothermic since energy would be being released. Since this reaction is endothermic we know that the products will have more energy than the reactants which means that the answer is B.
(the equation in the question does not have an arrow in it so I assumed it was between the 137kJ and C₂H₄).
I hope this helps. Let me know if anything is unclear.
A circuit with many paths for the current to travel through and not simply one is classified as a parallel circuit. Here the circuit can have many loops of resistors or light bulbs that can be attached.
The answer is false because its a physical change
When in solid state the charged particles (ions) are NOT free to move but when in melted the ions are free to move.
Answer:
Mg(OH)2 + 2HCl -> MgCl2 + 2H2O