Reactivity 1 : What drives chemical reactions?

What drives Chemical Reactions?

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What drives Chemical Reactions?

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A simple calorimeter was set up to determine the enthalpy change occurring when one mole of ethanol is combusted.

The specific heat capacities of two substances are given in the table below.

Which processes are exothermic?

Ethyne, like ethene, undergoes hydrogenation to form ethane.

Reactivity 1 : What drives chemical reactions?

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A simple calorimeter was set up to determine the enthalpy change occurring when one mole of ethanol is combusted. The experimental value was found to be –867 kJmol^–1. The Data Booklet value is –1367 kJmol^–1 (at 298 K and 1.01×10⁵ Pa).

During the experiment some black soot formed. Which statements are correct?

The percentage error for the experiment can be calculated as (1367–867)×100%
The difference between the two values may be due to heat loss to the surroundings.
The black soot suggests that incomplete combustion occurred.

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I and III only

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I, II and III

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