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Burning of fuel is a
For a reaction given below
C(s) + O2 (g) -> CO2 (g) + 394 kJ / mol
The enthalpy of reaction is
NTS 2016 SMBBMC
Chemistry
Thermochemistry
Elimination Tool:
Formation of carbon dioxide hinders in calculating the heat of formation of:
PMC Practice 1
Chemistry
Thermochemistry
Elimination Tool:
Thermochemistry is very important to learn about
PMC Sample 1
Chemistry
Thermochemistry
Elimination Tool:
Starting point of Kelvin scale is:
NUMS 2020
Chemistry
Thermochemistry
Elimination Tool:
Which ion will have a maximum value of the heat of hydration?
PMC Practice 1
Chemistry
Thermochemistry
Elimination Tool:
In those reactions where determination of enthalpy value is difficult by experiments, in such cases enthalpy value can be calculated by:
NTS 2014
Chemistry
Thermochemistry
Elimination Tool:
For a chemical reaction A + B, the threshold energy of the reaction is 31 KJ/mole. The average internal energy of A is 12 KJ/mole. What will be the activation energy of A?
NUMS 2018
Chemistry
Thermochemistry
Elimination Tool:
Value of heat capacity of water is
What is the measure of activation energy in an endothermic reaction?
UHS 2019
Chemistry
Thermochemistry
Elimination Tool:
Heat evolved or absorbed in a chemical reaction does not depend upon?
NTS 2016 SMBBMC
Chemistry
Thermochemistry
Elimination Tool:
Which of the following statements is NOT true for the first law of thermodynamics?
NTS 2014
Chemistry
Thermochemistry
Elimination Tool:
The reaction 2CO + O2 -> 2CO2 proceeds slower because activation energy is:
NTS 2018
Chemistry
Thermochemistry
Elimination Tool:
Heat of vaporization of water is kcal/kg
Lattice Energy of ionic compounds are found by
PMC Sample 3
Chemistry
Chemical Bonding
Thermochemistry
Elimination Tool:
Energy for the endothermic reaction is given a ____ value?
PMC Practice 1
Chemistry
Thermochemistry
Elimination Tool:
Which enthalpy change is relevant in the following process
Na(s) -> Na (g) ΔH = +107
UHS 2019
Chemistry
Thermochemistry
Elimination Tool:
If pressure and volume of a gas are variable while temperature remains constant, this belongs to
PMC Sample 2
Chemistry
Thermochemistry
Elimination Tool:
In an adiabatic process:
NUMS 2016
Chemistry
Thermochemistry
Elimination Tool:
Work done on the system is
PMC Sample 1
Chemistry
Thermochemistry
Elimination Tool:
Which of the following condition is constant in Bomb calorimeter?
PMC Practice 1
Chemistry
Thermochemistry
Elimination Tool:
The thermal energy at constant pressure is called:
PMC 2020
Chemistry
Thermochemistry
Elimination Tool:
The enthalpy of certain reactions at 273 K is -20.75 kJ. The enthalpy of the same reaction at 373 K (if heat capacities of reactants and products are the same) will be:
NTS 2017
Chemistry
Thermochemistry
Elimination Tool:
The measurement of heat absorbed or given out in a chemical reaction is referred to as:
NTS 2011
Chemistry
Thermochemistry
Elimination Tool:
A catalyst increases the rate of reaction by:
NTS 2019
Chemistry
Thermochemistry
Elimination Tool:
Two rocket fuels below are determined by their high performance.
N2H4(l) + O2(g) -> N2(g) + 2H2O(l) ΔH= -632 kJ
H2 (g) + ½ O2(g) -> H2O(l) ΔH = -286 kJ
If equal masses of hydrazine and hydrogen are used, which of the following has better performance?
NUMS 2019 Cancelled
Chemistry
Thermochemistry
Elimination Tool:
During a chemical reaction, heat of Formation Is:
Heat of Neutralization is defined as:
Through what phenomenons does heat flow?
PMC Sample 2
Chemistry
Thermochemistry
Elimination Tool:
Enthalpy of a compound is equal to its
NUMS 2016
Chemistry
Thermochemistry
Elimination Tool:
Which of the following values of heat of formation indicates that the product is least stable?
NTS 2017
Chemistry
Thermochemistry
Elimination Tool:
In chemistry the work is generally ___.
PMC Sample 1
Chemistry
Thermochemistry
Elimination Tool:
The enthalpy change accompanying the gain of an electron by a neutral gaseous atom to form a negative ion is called:
NTS 2010
Chemistry
Thermochemistry
Elimination Tool:
One Calorie is equivalent to:
NTS 2019
Chemistry
Thermochemistry
Elimination Tool:
If a graph is plotted between pressure on x- axis and volume on y- axis for Boyle’s law verification, the curve obtained is called
PMC Sample 2
Chemistry
Thermochemistry
Elimination Tool:
Anything under test or observation in laboratory is called
PMC Sample 2
Chemistry
Thermochemistry
Elimination Tool:
The net heat change in a chemical reaction is the same whether it is brought about in two or more different ways in one or several steps. This is known as:
NTS 2019
Chemistry
Thermochemistry
Elimination Tool:
Which of following is NOT state variable of thermodynamics?
Some substances lack definite heats of fusion. These substances are:
NUMS 2020
Chemistry
Thermochemistry
Elimination Tool:
If a system absorbs heat, the surrounding temperature
When two moles of H2 and one mole of O2 react to form H2O, 484 KJ heat is evolved. What is Δ Hf for one mole of H2O?
NUMS 2019 Reconduct
Chemistry
Thermochemistry
Elimination Tool:
ΔH = ΔE + PΔV is the change in enthalpy at constant ________.
NUMS 2018
Chemistry
Thermochemistry
Elimination Tool:
Which of the following are the fundamental ways of transferring energy?
NUMS 2014
Chemistry
Thermochemistry
Elimination Tool:
Exothermic Reactions heat is
PMC Sample 2
Chemistry
Thermochemistry
Elimination Tool:
One Calorie is equal to:
PMC 2020
Chemistry
Thermochemistry
Elimination Tool:
For a chemical reaction A -> B, the threshold energy of the reaction is 37 kJ/mole. The average internal energy of A is 12 kJ/Mole. What will be the activation energy of A?
NTS 2016 SMBBMC
Chemistry
Thermochemistry
Elimination Tool:
Which of the following has the maximum specific heat?
Which one of the following equations correctly defines the enthalpy changes of formation of carbon monoxide:
NUMS 2018
Chemistry
Thermochemistry
Elimination Tool:
The heat of a reaction can be calculated by using:
NTS 2010
Chemistry
Thermochemistry
Elimination Tool:
Transfer of heat from hot surroundings to a cold refrigerator is an example of:
NUMS 2014
Chemistry
Thermochemistry
Elimination Tool:
Cl + e —-> Cl-
ΔH = -348kJ/mol
The value -348KJ/mol in this case will be:
NTS 2012
Chemistry
Thermochemistry
Elimination Tool:
Born Haber cycle is used to determine:
PMC 2020
Chemistry
Thermochemistry
Elimination Tool:
The enthalpy change of the reaction
H2(g) + ½ O2 -> H2O (l)
under standard conditions is:
NUMS 2017
Chemistry
Thermochemistry
Elimination Tool:
Given the bond energy N ≡ N, N – H and H – H bonds are 945, 391, and 436 kJmol-1 respectively, the enthalpy of the reaction N2 (g) + 3H2(g) -> 2NH3 (g) is;
NUMS 2017
Chemistry
Thermochemistry
Elimination Tool:
Which one is not related to evaporation?
NUMS 2015
Chemistry
Thermochemistry
States of Matter
States of Matter – Gases, Liquids and Solids
Elimination Tool:
Molar heat of vaporization is the amount of heat required to convert one mole of:
NUMS 2020
Chemistry
Thermochemistry
Elimination Tool: