Fires 2 - Arson, Legal Liability and Redox Chemistry Flashcards

1
Q

List five reasons for arson

A
  • malicious destruction of property
  • insurance fraud
  • attempt to harm a person (revenge)
  • juvenile disorder
  • mental health and psychological problems
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2
Q

Why are many arson fires started?

A

in attempt to destroy evidence (fingerprints, fibres, DNA evidence) of a different crime at the scene however mitochondrial can withstand really high temperatures but it is harder to profile

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3
Q

What are three common settings for arson?

What % of arsonists are male?

A

vehicle fires
theft locations
dwellings (to destroy physical evidence and victims death)

90 %

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4
Q

What are four important statistics about arson in the UK?

A
  • largest cause of major fires in UK
  • leads to deaths, injuries and damage
  • costs in damages values £2.8 billion annually
  • holds a maximum life sentence judicially
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5
Q

What were arsonists responsible for between 1992 and 2002?

A

over 900,000 primary fires
28,000 injuries
1,100 deaths

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6
Q

What are the key messages from arson in UK?

A

detection and conviction rates are low and lot of youth arson

only 8 % of arson cases in 2003/4 resulted in suspects being identified and subsequently cautioned, charged or summoned in court, only around 15% of these found guilty and sentenced through magistrates court (66 % < 18) and around 15 % found guilty (11 % < 18)

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7
Q

What was set up in 2001 by UK government?

What was its primary directives?

What was its primary bodies?

What was its outlined target? Was this met?

A

Arson Control Forum
- chaired by HM chief inspector of fire services

primary directives: reduce arson related deaths, injuries and damage

primary bodies: Kent FRS, MET police, HM government, department of health, UK trade and investment, department for business innovation and skills, home office, ministry of defence, HM revenue and customs, local government associates, Aviva (insurance companies)

reduction of deliberate fires by 10 % by 2010. target was met as there was a 50 % reduction in arson by 2010

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8
Q

What is the correlation between low income households, arson, and likeliness to die in a fire?

A

when compared to those on average incomes, low income households suffer rates of arson 31 x more and are 16 x more likely to die from a fire

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9
Q

How did the ACF achieve successfulness in meeting the target?

Why were they so successful?

A
  • education
  • combatting arson supports government action on social exclusion
  • invested £2.25 million in local arson initiatives (2001-3)
  • invested £9.3 million to 66 local initiatives to address arson, £3.3 million to 29 car clearance schemes and £4.6 million to 24 arson task forces (2003-6)

spent resources from government but spent them in a very targeted manner to cause maximum impact

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10
Q

What did ACF commission research into to improve understanding?

A
  • motivation of arsonists
  • links between vehicular arson, abandoned vehicles and other vehicle crime
  • found social exclusion was most correlated thing with someone being an arsonist
  • why arson prosecutions ‘fail’ (if make arson prosecution a deterrent it will prevent arson crimes)
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11
Q

What has happened recently with ACF?

A
  • since 2013 rebranded to arson prevention forum
  • has been scaled down with reduced government funding
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12
Q

In 2017, how many fires attended by FRS in England and were deliberate? How many deaths did this cause?

How does this compare to 2014/15?

How many successful prosecutions? Compared to previous decade?

A

47 % and 47 deaths

11 % increase in deliberate fires
44 % increase in deliberate road vehicle fires
19 % increase in deliberate other building fires

1242 / 21,961 successful prosecutions
worst in last decade

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13
Q

In 2018, how many fires attended by FRS in England and were deliberate? How many deaths did this cause?

How does this compare to 2011/12?

What was insurance claim total?

A

50.5 %

up 15 % since 2011/12

Insurance claims total £1.2 billion, with a total economic impact of £5-11 billion

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14
Q

What fires can still carry a legal liability?

What does this apply to?

Give 3 examples of these types of fires?

A

fires that can be considered accidental in nature (no malicious intent) can still carry a legal liability (and criminal proceedings)

apples to original cause and of fire and any factors assisting to its spread

1 - infringement of safety legislation and regulations (COSHH)
- unlicensed storage of fuel or other flammable substances, storage in unsuitable containers or excessive quantities

2 - neglect - failure to exercise an employers ‘duty of care’
- failure to undertake safety inspections e.g. checking for peroxide crystals

3 - fire caused as a consequence of committing another crime
- illegal bypassing of gas meters
- use of unqualified gas fitters (corruptly awarded by local council)

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15
Q

define ‘combustion’

A

the process of burning
a chemical change especially oxidation, accompanied by the production of heat and light.

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16
Q

define ‘fire’

A

a rapid persistent chemical change that releases heat and light and is accompanied by flame, especially the exothermic oxidation of a combustible substance

or

a continuous series of exothermic, oxidative reactions that involves the fuels (liquid and gaseous strictly) present

17
Q

what is the key difference between combustion and fire?

A

presence of flame in a fire (fire is a flaming combustion)

18
Q

define ‘flame’

A

the zone of burning gases and fine suspended matter associated with rapid combustion.

a hot glowing mass of burning gas or vapour

the condition of active, blazing combustion.

a region in which chemical interaction between gases occurs, accompanied by the evolution of heat and light

19
Q

What three conditions must be met in order for combustion to occur and what is this referred to?

do these three conditions automatically mean there will be a fire?

What else do you need for fire to occur?

A

fire triangle - fuel oxygen and heat (enough heat to initiate combustion by overcoming enough AE for process to occur)

No

ignition energy/chain reaction

20
Q

How can a fire be prevented with the fire triangle?

A

removing one of more of three components of triangle

21
Q

What type of process is combustion (oxidation/reduction) and (exothermic/endothermic)?

A

oxidation

exothermic - energy is liberated (for most part oxidation is exothermic)

22
Q

What does combustion of methane in presence of enough activation energy form?

what does combustion of aluminium form?

A

carbon dioxide and water

aluminium oxide

23
Q

what is heat of combustion vs enthalpy?

what is standard enthalpy of combustion (AHC0)

A

heat of combustion - heat that is liberated

this is called enthalpy at constant pressure

refers to standard conditions - 298K temperature and pressure 1 atm and it assumes complete combustion (to CO2 and not CO) and H2O is formed as a liquid not a gas

24
Q

What is incomplete combustion?

A

when some CO is produced as well as CO2 due to limited oxygen supply

CO is poisonous and can further combust

25
Q

Define OILRIG

A

oxidation
is
loss of elections
reduction
is
gain of elections

26
Q

Sulfur is an impurity in many fuels. What would the product of complete combustion of sulfur be?

A

SO3