The activation energy for the reaction no2 (g )+ co (g) ⟶ no (g) + co2 (g) is ea = 217 kj/mol and the change in enthalpy for the reaction is δh = -293 kj/mol .
what is the activation energy for the reverse reaction?
enter your answer numerically and in terms of kj/mol.

Answer : The activation energy for the reverse reaction is 510 kJ/mol.

Explanation :

Activation energy : It is defined as the minimum amount of energy given to the reactant so that it gets converted into products.

The relation between the activation energy for forward and backward reaction and change in enthalpy of reaction for exothermic reaction is:

When activation energy for forward reaction is less than the activation energy for backward reaction then the reaction will be exothermic. In exothermic reaction the enthalpy change will be negative.

The relation between the activation energy for forward and backward reaction and change in enthalpy of reaction for endothermic reaction is:

When activation energy for forward reaction is more than the activation energy for backward reaction then the reaction will be endothermic. In endothermic reaction the enthalpy change will be positive.

where,

= activation energy for forward reaction

= activation energy for backward reaction

= change in enthalpy of reaction

As per question, the value of enthalpy change is -293 kJ/mol that means the reaction will be exothermic reaction. So,

Given:

= activation energy for forward reaction = 217 kJ/mol

= activation energy for backward reaction = ?

= change in enthalpy of reaction = -293 kJ/mol

Now put all the given values in above relation, we get:

Therefore, the activation energy for the reverse reaction is 510 kJ/mol.

en el barco… .. ¿donde comes? yo como en el comedor del barco

¿qué estás comiendo?   estoy comiendo arroz con pollo.

¿que hay en la mesa?   en la mesa hay muchos platos y un bonito juego de cubiertos.

¿qué haces en el club de la juventud? me junto con mis amigos y jugamos cartas hasta tarde.

¿qué haces en la piscina? en la piscina, nado con mis amigos.

¿estabas dormido? no, estaba leyendo una revista.

¿qué ves en el teatro? en el teatro veo una obra de lope de vega.

a que hora vives hoy. this is illogical because it means what time do you live today? it should be: ¿ a qué hora vienes hoy? hoy vengo a las 4 de la tarde.

¿a qué hora en el verano? en el verano vengo más temprano.

¿qué llevas puesto hoy? hoy llevo puesto un polo y unos pantalones negros.

¿qué te pones cuando vas a la escuela? me pongo un uniforme y zapatos negros.

¿a dónde vas hoy? hoy voy al cine.

¿mañana? en el barco. mañana voy al gimnasio.

you need to take a look at the periodic system in order to sort these elements into pairs that would most likely exhibit similar chemical properties. first, you need to find elements that are found in the same group (groups are vertical in the periodic system), and then to see whether they have the same valence number. if they meet these criteria, they will have similar properties.

the first pair: ne (neon) and kr (krypton), are noble gases found in group 8

the second pair: li (lithium) and k (potassium), found in group 1

the third pair: s (sulfur) and te (tellurium), found in group 6