Chapter 10.7, Problem 47PP

(a)

Interpretation Introduction

Interpretation:

Interpret the heat change in joules to vaporise 10 g of water.

Concept Introduction:

Heat for changing the state of water from ice can be determined as:

  ${\text{Q}}_{\text{1}}\text{= m s dT}$

Heat required for changing the state of ice from solid to liquid.

  ${\text{Q}}_{\text{2}}\text{= m L}$

Where, m is mass of ice or water

S is specific heat of water

dT is the change in temperature

(b)

Interpretation Introduction

Interpretation:

Interpret the heat change in kJ to vaporise 50 g of ethanol.

Concept Introduction:

Heat for changing the state of water from ice can be determined as:

  ${\text{Q}}_{\text{1}}\text{= m s dT}$

Heat required for changing the state of ice from solid to liquid.

  ${\text{Q}}_{\text{2}}\text{= m L}$

Where, m is mass of ice or water

S is specific heat of water

dT is the change in temperature

(c)

Interpretation Introduction

Interpretation:

Interpret the heat change in joules to condense 8.0 g of acetic acid.

Concept Introduction:

Heat for changing the state of water from ice can be determined as:

  ${\text{Q}}_{\text{1}}\text{= m s dT}$

Heat required for changing the state of ice from solid to liquid.

  ${\text{Q}}_{\text{2}}\text{= m L}$

Where, m is mass of ice or water

S is specific heat of water

dT is the change in temperature

(d)

Interpretation Introduction

Interpretation:

Interpret the heat change in kJ to condense 0.175 kg of ammonia.

Concept Introduction:

Heat for changing the state of water from ice can be determined as:

  ${\text{Q}}_{\text{1}}\text{= m s dT}$

Heat required for changing the state of ice from solid to liquid.

  ${\text{Q}}_{\text{2}}\text{= m L}$

Where, m is mass of ice or water

S is specific heat of water

dT is the change in temperature