Chapter 18, Problem 18.34SP

(a)

Interpretation Introduction

Interpretation:

The compound that gives more hydrogen has to be given.

Concept Introduction:

Binary Hydrides:

These are compounds of Hydrogen that comprises of Hydrogen and one other chemical element.  The binary hydrogen compounds are called as hydrides even if the hydrogen atom in it is not an anion.  The three major groups of binary hydrides are,

1. 1) Ionic hydrides
2. 2) Covalent hydrides
3. 3) Metallic hydrides.

(b)

Interpretation Introduction

Interpretation:

The amount (in kilograms) of ${\text{CaH}}_{\text{2}}$ that is required to fill a $\text{100}\text{L}$ tank at $\text{20°C}$ and $\text{150}\text{atm}$ pressure has to be given.

Concept Introduction:

Ideal gas law is applicable to those gases which obey Boyle’s law and Charles’s law. The ideal gas equation can be obtained by combining the equations of Boyle’s law and Charles’s law.

At constant temperature, (Boyle’s law)

$\text{Pα}\frac{\text{1}}{\text{V}}$

At constant volume, (Charles’s law)

$\text{PαT}$

By combining the above equations,

$\begin{array}{l}\text{Pα}\frac{\text{T}}{\text{V}}\\ \\ \text{PVαT}\\ \\ \text{PV=RT}\end{array}$

Where R= proportionality constant called as gas constant.

The general equation for ideal gas law is written as,

$\text{PV=nRT}$

Where n= number of moles