1st sec online quiz 2

What is the heat content of methane of this reaction:

CH4(g) +2O2(g) ….>CO2(g) +2H2O(V) , ∆H= - 805kJ

• -76.4KJ/mol

• +67.6KJ/mol

• -74.6KJ/mol

• +74.6KJ/ mol

In the following table :

What is the quantity of heat of the following reaction:

X2Y(L)……..> X2(g) + 1/2 Y2(g)

• +535KJ

• - 535KJ

• +253KJ

• - 253KJ

From this thermal equation A (S ) → B (L) - 6Kj SO we conclude?

• The heat content of A= the heat content of B

• the heat content of A< the heat content of B

• the heat content of A > the heat content of B

• the heat content of A double the heat content of B

the following reaction represents the decomposition of iron sulphate( II ) :

2FeSO4(S) +420KJ……..> Fe2O3(S) +SO3(g) +SO2(g)

Which of the following represents the pervious reaction?

• 🤡

• 🌚

• 😊

• 🥰

Which of the following represents this reaction: 2H +Cl …..> 2HCl

• ∆H>0

• ∆H<0

• ∆H=0

• ∆H=+120KJ/mol

On the opposite figure represents one of the thermal reactions and so we conclude

that ……

• a)heat content of nitric oxide (NO)=180.6kj

• heat content of nitric oxide (NO)=90.3kj

• the reaction is exothermic, ∆H= -90.3kj

• the reaction is endothermic, ∆H= -180.6kj

on the following figure , what is the change in heat content(enthalpy change) of the

following reaction:

2X2Y(l)➡️2X2(g) +Y2(g)

• -285KJ

• +285KJ

• -570KJ

• +570KJ

Hydrogen gas combines with oxygen gas and release an amount of energy according to

this equation:

2H2(g) +O2(g)➡️ 2H2O(V) , ∆HC =-484KJ

SO the change of heat content which producing of burning mole of hydrogen burning

completely equal…

• -129KJ/mol

• -484KJ/mol

• -121KJ/mol

• -242KJ/mol

by using the following equation: H2(g) +I2(g) +51.9KJ➡️ 2HI(g)

Express about the reaction by thermal chemical equation and ∆H is expressed by KJ/mol

• Endothermic, ∆H= +51.9kJ

• Exothermic, ∆H= -51.9kJ

• Exothermic, ∆H= -51.9KJ

• Endothermic, ∆H= -51.9KJ