MCQ

CH5 - CHEMICAL ENERGETICS

The first stage in the industrial production of nitric acid from ammonia can be represented by the following equation.4NH$_3$(g) + 5O$_2$(g) ⇌ 4NO(g...

2009 Winter

Theory

CH5 - CHEMICAL ENERGETICS

(a) (i) Use the data to calculate $\Delta H^\circ_{\text{reaction}}$ for the formation of CH$_3$Cl. CH$_4$ + Cl$_2$ $\rightarrow$ CH$_3$Cl + HCl (...

2009 Winter

Theory

CH5 - CHEMICAL ENERGETICS

(a) Show by means of an equation what is meant by the lattice energy of calcium chloride.................................................................

2009 Winter

Theory

CH5 - CHEMICAL ENERGETICS

(a) Describe and explain qualitatively the trend in the solubilities of the sulfates of the Group II elements. (b) The major ore of barium is barytes...

2009 Winter

Theory

CH5 - CHEMICAL ENERGETICS

(a) What is meant by the term bond energy ?    (b) Describe and explain what is observed when a red-hot wire is plunged into separate sampl...

2009 Winter

MCQ

CH5 - CHEMICAL ENERGETICS

Some bond energy values are listed below. [Table_1: ] These bond energy values relate to the following four reactions. P Br_2 \rightarrow 2Br Q ...

2010 Summer

MCQ

CH5 - CHEMICAL ENERGETICS

Given the following enthalpy changes,$I_2(g) + 3Cl_2(g) \rightarrow 2ICl_3(s) \quad \Delta H^\circ = -214 \text{ kJ mol}^{-1}$$I_2(s) \rightarrow I_2(...

2010 Summer

MCQ

CH5 - CHEMICAL ENERGETICS

Some bond energy values are listed below.[Table_1]These bond energy values relate to the following four reactions.P \( \text{Br}_2 \rightarrow 2\text{...

2010 Summer

MCQ

CH5 - CHEMICAL ENERGETICS

Given the following enthalpy changes,$$I_2(g) + 3Cl_2(g) \rightarrow 2ICl_3(s) \quad \Delta H^\circ = -214 \text{ kJ mol}^{-1}$$$$I_2(s) \rightarrow I...

2010 Summer

Theory

CH5 - CHEMICAL ENERGETICS

Hydrazine, N$_2$H$_4$, can be used as a rocket fuel and is stored as a liquid. It reacts exothermically with oxygen to give only gaseous products. Th...

2010 Summer

MCQ

CH2 - ATOMIC STRUCTURE

Which species contains the same number of neutrons as $^{14}_{6}\text{C}$ and the same number of electrons as $^{23}_{11}\text{Na}^+$?

2024 Spring

MCQ

CH5 - CHEMICAL ENERGETICS

Which process has the largest enthalpy change per mole?

2024 Spring

MCQ

CH1 - ATOMS, MOLECULES & STOICHIOMETRY

Which sodium compound contains 74.2% by mass of sodium?

2024 Spring

MCQ

CH1 - ATOMS, MOLECULES & STOICHIOMETRY

What is the maximum volume of sulfur dioxide gas measured at room conditions produced from burning 100\,\text{dm}^3 of diesel fuel containing 0.834\,\...

2024 Spring

MCQ

CH14 - AN INTRODUCTION TO ORGANIC CHEMISTRY

Which row shows the correct number of covalent bonds in a molecule of methylpropene? [Table_1]

2024 Spring

MCQ

CH3 - CHEMICAL BONDING

Aluminium chloride exists as $\text{Al}_2\text{Cl}_6$ molecules at room temperature. When heated to a high temperature, $\text{AlCl}_3$ molecules are ...

2024 Spring

MCQ

CH4 - STATES OF MATTER

The table shows the physical properties of four substances. Which substance has a giant covalent structure?

2024 Spring

MCQ

CH4 - STATES OF MATTER

At room temperature and pressure, $\text{H}_2\text{O}$ is a liquid and $\text{H}_2\text{S}$ is a gas.What is the reason for this difference of state?

2024 Spring

MCQ

CH5 - CHEMICAL ENERGETICS

The enthalpy change for a reaction can be calculated from values of:• enthalpies of formation, $\Delta H^{\circ}_f$• enthalpies of combustio...

2024 Spring

MCQ

CH5 - CHEMICAL ENERGETICS

Which reaction has an enthalpy change equal to the standard enthalpy change of formation of propane?

2024 Spring