Level 1 Chemistry (90932) 2012 PDF

réactifs et les produits : le glucose C6H12O6 réagit avec le dioxygène O2 pour former du dioxyde de carbone CO2 et de l'eau H2O. Une équation chimique

équations bilans

énergie de mouvement par une réaction chimique la combustion du glucose

NZQA - NCEA Level 1 Chemistry (90932) 2018

of CO and / or C (soot). • Links complete and incomplete combustion to the amount of oxygen and products produced. AND. One balanced symbol equation.

How many water molecules produce during the complete oxidation

water involvement in the aconitase reaction can be Complete Oxidation of Glucose? ... Sum of all reactions for combustion of glucose.

NZQA - NCEA Level 1 Chemistry (90932) 2021

oxygen gas that is needed from the atmosphere for complete combustion to occur Glucose is converted ... (ii) Complete combustion of ethanol equations:.

Level 2 Chemistry (91164) 2015

23/11/2015 TOTAL. Level 2 Chemistry 2015 ... O(?)

Level 1 Chemistry (90932) 2012

22/11/2012 (d) Identify and evaluate ONE effect that a product of the complete combustion reaction for ethanol would have on the environment.

Stoichiometry of the water molecules in glucose oxidation revisited

from glucose combustion in a calorimeter (eqn 2) by glucose molecule we can rewrite the overall reaction (eqn. 1) of the complete biological oxidation ...

Thermochemistry

The total quantity of matter and energy in the universe is fixed. For example the combustion reaction that occurs when using an oxyacetylene torch.

Chemistry 30 2017 Released Diploma Examination Items

Fermentation of fruits and grains converts glucose to ethanol and carbon dioxide as Ethyne

Energie des combustions - Correction - AlloSchool

a Ecrire les équations des réactions de combustion complète du glucose et de la butyrine solide C6H12O6 ( æ)+6 O 6 (g) ?6 CO (g)+6 H 6O (g) 2 C15H26O6 ( æ)+37 O 6 (g) ?30 CO (g)+26 H 6O (g) b Calculer les masses molaires du glucose et de ma butyrine

Chapter 2 Thermodynamics of Combustion - NRC

2: (2 11) Note that on the reactant side there are 2·(1+3 76) or 9 52 mol of air and its molecular mass is 28 96 kg/kmol In this text the reactions are balanced using 1 mol of fuel This is done here to simplify the calculations of the heat of reaction and ?ame temperature later in the chapter

What is the equation for combustion of glucose?

The equation for the combustion of glucose is: C6H12O6 (s) + 6O2 (g) -->6CO2 (g) + 6H2O (g). How many grams of H2O will be produced when 8.064g of glucose is burned? What is the combustion reaction of sucrose? Is combustion exothermic or endothermic, and why?

What is the balanced chemical equation for glucose?

Explanation: The complete combustion of glucose will give carbon dioxide and water, therefore, the balanced chemical equation can be written as: C6H 12O6(s) +6O2(g) ? 6CO2(g) + 6H 2O(g)

What is the total heat released during the combustion of glucose?

O(l) A 2.50 g sample of glucose and an excess of O 2 (g) were placed in a calorimeter. After the reaction was initiated and proceeded to completion, the total heat released by the reaction was calculated to be 39.0 kJ. (b) Calculate the value of ?H°, in kJ mol?1, for the combustion of glucose. 2.50 g ×612 6 1 mol C H O 180.16 g C H O 612 6

What is the formula for combustion of sucrose?

Combustion of sucrose is given by the chemical equation, C/b> + 12 O2 ——> 12CO2 + 11 H2O… What is true for combustion of sucrose?

9093201

SUPERVISOR"S USE ONLY

90932

ASSESSOR"S USE ONLY

TOTAL Level 1

Chemistry,

2012

90932 Demonstrate understanding of aspects

of carbon chemistry

9.30 a

AchievementAchievement with MeritAchievement with Excellence You should attempt ALL the questions in this booklet. YOU MUST HAND THIS BOOKLET TO THE SUPERVISOR AT THE END OF THE EXAMINATION.

QUESTION ONE: ETHANOL

Ethanol can be produced by the fermentation of glucose. (a)

Draw the structural formula of ethanol.

(b) Outline the fermentation process that produces ethanol from glucose (C 6 H 12 O 6 Include the conditions required for this process to occur, and a balanced symbol equation.

ASSESSOR'S

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State the type of combustion reaction ethanol undergoes and name the products formed. Write a balanced symbol equation for the reaction of ethanol burning in a ir. (d) Identify and evaluate ONE effect that a product of the complete combustion reaction for ethanol would have on the environment.

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QUESTION TWO: CRACKING

Crude oil is made up of different fractions. Some of these fractions contain large chain hydrocarbons that may not be useful as fuels. Cracking is the process used to produce smaller, more useful hydrocarbons. Give a detailed account of the process of cracking.

In your answer you should:

not be useful as fuels why they form by referring to their chemical structures 4

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QUESTION THREE: PROPERTIES OF HYDROCARBONS

-250-200-150-100-50050100150 1234

Number of carbon atoms

Temperature °C

5678

Boiling points of straight chain alkanes

adapted from www.meta-synthesis.com/webbook/06_ligands/lig09.jpg (a) Name and draw the structural formulae of the alkanes with 3 and 7 carbon atoms.

Name:Name:

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(c) In October 2011 a ship, the Rena, grounded on a reef near Tauranga Harbour, causing oil to be spilled into the ocean. It was observed that the oil formed a layer on top of the water, and that it lasted for a long time. 7

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QUESTION FOUR: POLYMERS

This is a section of the polymer polyethene (polythene): - C - C - C - C - C - C - C - C - C - C

H H H H H H H H H H

Name: human health of the products of this combustion reaction. 8

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(c) Polyethene is available in both a low density (LDPE) and high density (HDPE) form. Some properties of LDPE and HDPE are given in the table below.

MassSolubility

in water

Chemical

resistance

FlexibilityPolymer chain

packing LDPE (low density polyethene) lightinsolublehighchains packed loosely together HDPE (high density polyethene) lightinsolublehighchains packed closely together bottles, by analysing the properties provided in the table above.

Question Four continues

on the following page.

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ASSESSOR'S

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QUESTION

NUMBER

Extra paper if required.

Write the question number(s) if applicable.

90932
quotesdbs_dbs31.pdfusesText_37

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[PDF] Level 1 Chemistry (90932) 2012

What is the equation for combustion of glucose?

What is the balanced chemical equation for glucose?

What is the total heat released during the combustion of glucose?

What is the formula for combustion of sucrose?

9093201

SUPERVISOR"S USE ONLY

ASSESSOR"S USE ONLY

Chemistry,

90932 Demonstrate understanding of aspects

9.30 a

QUESTION ONE: ETHANOL

Draw the structural formula of ethanol.

ASSESSOR'S

USE ONLY

ASSESSOR'S

USE ONLY

QUESTION TWO: CRACKING

In your answer you should:

ASSESSOR'S

USE ONLY

ASSESSOR'S

USE ONLY

QUESTION THREE: PROPERTIES OF HYDROCARBONS

Number of carbon atoms

Temperature °C

Boiling points of straight chain alkanes

Name:Name:

ASSESSOR'S

USE ONLY

ASSESSOR'S

USE ONLY

QUESTION FOUR: POLYMERS

H H H H H H H H H H

H H H H H H H H H H

ASSESSOR'S

USE ONLY

MassSolubility

Chemical

FlexibilityPolymer chain

Question Four continues

ASSESSOR'S

USE ONLY

ASSESSOR'S

USE ONLY

ASSESSOR'S

USE ONLY

QUESTION

NUMBER

Extra paper if required.

Write the question number(s) if applicable.