IB Chemistry Reactivity 1. What Drives Chemical Reactions? Questionbank

For a reaction where $\Delta H > 0$ and $\Delta S < 0$, what is the sign of $\Delta G$ at all temperatures?

What is the definition of fuel in chemistry?

Which of the following processes has a negative entropy change ($\Delta S$)?

Neutralization

Precipitation

Combustion

Fermentation

Standard enthalpy of formation

Standard enthalpy of combustion

Bond enthalpy

Standard enthalpy of neutralization

Positive

Negative

Zero

Temperature dependent

A substance that reduces another in a chemical reaction

A substance that absorbs energy when burned

A substance that releases energy upon combustion

A substance that contains no carbon

$\text{H}_2\text{O}(l) \rightarrow \text{H}_2\text{O}(g)$

$\text{CO}_2(g) \rightarrow \text{CO}_2(s)$

$\text{NaCl}(s) \rightarrow \text{Na}^+(aq) + \text{Cl}^-(aq)$

$\text{NH}_4\text{NO}_3(s) \rightarrow \text{NH}_4^+(aq) + \text{NO}_3^-(aq)$