CO, (g) + H2O(g) CH, (g) + 202 (g) All 3 The enthalpy change for a reaction depe

Question

CO, (g) + H2O(g) CH, (g) + 202 (g) All 3 The enthalpy change for a reaction depends on the phases of state for the reactants and products. Part A Methanol is combusted to provide heat The reaction and the enthalpy for the reaction are shown below CH3OH(I) + 1.502 (g) CO2 (g) + 2H20(1) =-715 kJ Below is a list of sentences that describe a chemical reaction. Choose all of the sentences that apply to the above reaction Check all that apply. View Available Hint(s) This chemical reaction transfers heat from the system to the surroundings m The enthalpy for 2CHOH(g) + 302(g) 2CO2 (g) + 4H20(1)s-715 kJ This chemical reaction transfers heat from the surroundings to the system The enthalpy for 2CHOH(I) + 302 (g) 2C02 (g) + 4H20(1) is-1 430 kJ The enthalpy for 2CH3OH(I) + 30, (g) 2CO2(g) t 4H20(1)s 715 kJ The enthalpy for 2CHORI(I) + 3O2(g) 2CO2 (g) + 4H20(1)s 1 .430 kJ This process is exothermic. This process is endothermic

Explanation / Answer

The correct options are : 1 , 4 and 7

because

we have a reaction

CH3OH (l) + 1.5 O2 (g) -----------------> CO2 (g) + 2 H2O (l)

and

enthalpy is equal to - 715 kJ.

which means that

reaction is exothermic.

and

The heat is being transfered from system to surroundings.

and

multiplying reaction by 2 gives :

2 CH3OH (l) + 3 O2 (g) -----------------> 2 CO2 (g) + 4 H2O (l) dH = - 1,430 kJ.

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