Standard enthalpy Study guides, Class notes & Summaries
Looking for the best study guides, study notes and summaries about Standard enthalpy? On this page you'll find 286 study documents about Standard enthalpy.
All 286 results
Sort by
-
AQA AS CHEMISTRY 7404/2 Paper 2 Organic and Physical Chemistry Question Paper + Mark scheme [MERGED] June 2022 *JUN227404201* IB/M/Jun22/E7 7404/2 For Examiner’s Use Question Mark 1
- Exam (elaborations) • 63 pages • 2023
- Available in package deal
-
- $7.99
- 13x sold
- + learn more
AQA 
AS 
CHEMISTRY 
7404/2 
Paper 2 Organic and Physical Chemistry 
Question Paper + Mark scheme [MERGED] 
June 2022 
*JUN* 
IB/M/Jun22/E7 7404/2 
For Examiner’s Use 
Question Mark 
1 
2 
3 
4 
5 
6 
7 
Section B 
TOTAL 
Time allowed: 1 hour 30 minutes 
Materials 
For this paper you must have: 
• the Periodic Table/Data Sheet, provided as an insert (enclosed) 
• a ruler with millimetre measurements 
• a scientific calculator, which you are expected to use where appropriate. 
Instructions...
-
MCAT entrance exam all subjects combined questions & answers latest update
- Exam (elaborations) • 196 pages • 2023 Popular
- Available in package deal
-
- $15.99
- 3x sold
- + learn more
m 
 
 
 
 
 
 
1.	Which of the following is the mRNA start codon in most cases? 
 
A.	UAA	B. AGU	C. AUG	D. UGA 
 
 
 
2.	Which of the types of RNA is the smallest? 
 
A.	mRNA	B. tRNA	C. rRNA	D. 
 
 
 
3.	Which of the following is not considered a pyrimidine? 
 
A.	C	B. T	C. U	D. G 
 
 
 
4.	Which of the following is paired correctly? 
 
A.	A-G	B. C-G	C. A-U	D. G-T 
 
 
 
5.	Which of the following characterizes a Western blot? 
 
A.	Antibody/protein hybridization	B. DNA/RNA combination	C. RNA ...
-
Practicals Chemistry AQA A-level Rated A+
- Exam (elaborations) • 24 pages • 2023
- Available in package deal
-
- $9.99
- 1x sold
- + learn more
Practicals Chemistry AQA A-level Rated A+ 
Required Practical 1 - titration and making a standard solution 
Making a standard solution 1. weigh the required mass of solid using a sample bottle on a 2 dp balance. 
2. transfer the solid into a beaker using distilled water to wash it out- preventing any solid remaining in the sample bottle. 
3. reweigh the sample bottle and work out the difference. 
4. Add 100cm3 of distilled water to the beaker to dissolve the solid (small volume of water) using a...
-
IB chemistry HL Latest Version Graded A+
- Exam (elaborations) • 9 pages • 2024
- Available in package deal
-
- $9.99
- + learn more
IB chemistry HL Latest Version Graded 
 
A+ 
 
exothermic reaction heat is released by the system 
ΔΗ<0 
 
endothermic reaction heat is absorbed by the system 
ΔΗ>0 
 
standard enthalpy change of reaction(ΔΗ) the heat energy transferred under standard 
conditions (pressure-101.3 kPa, temperature- 298 K) 
 
combustion and neutralization are exothermic processes 
 
average bond enthalpy the energy required to break one mole of a certain type of bond in the 
gaseous state averaged acro...
-
IB Chemistry Topic 5 Latest Update Graded A+
- Exam (elaborations) • 7 pages • 2024
- Available in package deal
-
- $8.99
- + learn more
IB Chemistry Topic 5 Latest Update 
 
Graded A+ 
 
Enthalpy The amount of heat released (exothermic) or absorbed (endothermic) during a 
chemical reaction (the energy needed for the reaction to occur) 
This can be lowered with the presence of a catalyst. 
 
Change in Enthalpy Hproducts -Hreactants 
 
Specific heat equation c= q in Joules (or Change in H)/mass(g)(change in temp) 
 
Specific heat of water 4.18 J/gdegreesC 
**NOTE: Usually in kJ 
 
Endothermic v. Exothermic Endothermic: Absorbing e...
-
A Level Chemistry Edexcel Unit 8 - Energetics I notes written by a 3A* Imperial College London Medicine Student
- Summary • 17 pages • 2023
-
- $3.93
- 1x sold
- + learn more
Detailed notes on Unit 8 - Energetics I covering all the specification points, and allowed me to achieve an A* in chemistry. Covers enthalpy changes, thermochemical equations, Hess's law, Hess cycles, example calculations, standard enthalpy of formation, reaction, combustion, neutralisation and atomisation, bond enthalpy calculations with examples and enthalpy titrations.
-
CHEM 210 MODULE 3 EXAM QUESTIONS AND CORRECT ANSWERS, WITH COMPLETE SOLUTION 2024.
- Exam (elaborations) • 9 pages • 2024
- Available in package deal
-
- $11.49
- + learn more
CHEM 210 MODULE 3 EXAM QUESTIONS AND CORRECT ANSWERS, WITH COMPLETE SOLUTION 2024. 
 
What is meant by the term average bond enthalpy? 
(Average enthalpy change) when one mole of bonds 
 
of (gaseous covalent) bonds is broken 
The calculated value of ΔHc from this experiment is different from the value obtained 
from data books. 
Apart from heat loss, suggest two reasons for the difference. 
Assume that the calculation has been carried out correctly. 
incomplete combustion 
non-standard conditi...
-
AQA CHEMISTRY A LEVEL WITH COMPLETE SOLUTIONS covalent bond - ANSWER-a shared pair of electrons between non-metal elements co-ordinate bond - ANSWER-a shared pair of electrons where both electrons are supplied by one atom repulsion in shapes of molecu
- Exam (elaborations) • 70 pages • 2024
-
- $20.49
- + learn more
AQA CHEMISTRY A LEVEL WITH COMPLETE SOLUTIONS 
 
 
covalent bond - ANSWER-a shared pair of electrons between non-metal elements 
 
co-ordinate bond - ANSWER-a shared pair of electrons where both electrons are supplied by one atom 
 
repulsion in shapes of molecules - ANSWER-Lone pair-lone pair > lone pair-bonding pair > bonding pair-bonding pair 
 
electronegativity - ANSWER-the power of an atom to attract the pair of electrons in a covalent bond 
 
hess' law - ANSWER-Total enthalpy chang...
-
AQA A-Level Chemistry Exam (2024) || All Questions & Answers (Graded A+)
- Exam (elaborations) • 11 pages • 2024
- Available in package deal
-
- $10.50
- + learn more
AQA A-Level Chemistry Exam (2024) || All Questions & Answers (Graded A+) 
AQA A-Level Chemistry Exam (2024) || All Questions & Answers (Graded A+) 
 
Topic 1 - ANSWER - Atomic Structure 
 
Topic 2 - ANSWER - Amount of Substance 
 
State what is meant by the term molecular formula. - ANSWER - the actual no. atoms of each element in a compound 
 
Topic 3 - ANSWER - Bonding 
 
Explain why CF4 has a bond angle of 109.5°. - ANSWER - -there are 4 bonding pairs and no lone pairs 
-repel equally and th...
-
AQA A-level Chemistry paper 2 Questions & Correct Answers/ Graded A+
- Exam (elaborations) • 22 pages • 2024
- Available in package deal
-
- $13.49
- + learn more
elative atomic mass (Ar) 
: Average mass of an atom compared with one twelth of the mass of an atom of carbon 
12 
Electronegativity 
: Power of an atom to attract the pair of electrons in a covalent bond 
Standard enthalpy of combustion 
: Enthalpy change when 1 mole of a substance burns completely in oxygen under 
standard conditions with all reactants and products being in their standard state 
Standard enthalpy of formation 
: Enthalpy change when 1 mole of a compound is formed from it's ...
-
A LEVEL Chemisrty June 2020 Paper 2 Questions From Real Exams
- Exam (elaborations) • 31 pages • 2023
-
- $13.49
- + learn more
A LEVEL Chemisrty June 2020 Paper 2 Questions 
From Real Exams 
1 
2 
Section A 
Answer all questions in this section. 
Do not write 
outside the 
box 
This question is about 1-chloropropane. 
. Define the term standard enthalpy of formation. 
[2 marks] 
. The equation for a reaction used to manufacture 1-chloropropane is 
3CH3CH2CH2OH(l) + PCl3(l) 3CH3CH2CH2Cl(l) + H3PO3(s) 
The enthalpy change for this reaction, ΔH, is –114 kJ mol–1 
Table 1 contains some standard enthalpy of formati...