thermochemistry and exothermic reaction
thermal energy and endothermic reaction
radiant energy and photosynthesis
reactants
products
100
The internal energy of an isolated system increases over time.
The internal energy thus remains unchanged.
100
whats an example of a good emitter/radiator of heat?
radiators equipped with blowers and fan coils
100
These waves can travel through space
radient energy
100
What type of reaction occurs when petrol is burnt in vehicles?
Combustion reaction
100
what is a product?
The chemical substances which are formed due to a chemical reaction between two or more chemical substances
200
Energy can be written as a reactant on the left side of the arrow since it is being absorbed.
In chemical equations for endothermic reactions
200
The energy of activation for forward and backward change for an endothermic reaction; X→Y are Ef and Eb respectively. Which of the following is correct?
Ef and Eb respectively.
200
the emission or transmission of energy in the form of waves or particles through space or a material medium.
Radiation is the emission of energy as electromagnetic waves.
200
When hydrogen reacts with oxygen, water is formed. Which type of reaction is this?
Combination reaction
200
The major product of the following chemical reaction is
CH3CH2CN
→
3)
Pd/BaSO4
,
H21)
H3O+
,Δ
2)
SOCl2
CH3CH2CHO
300
The internal energy of a system is constant if no work is done on or by the system and no heat is exchanged.
the internal energy decreases.
300
in a freezer, how can thermal energy be transferred through the insulating material at a slow rate?
not allowing heat to be absorbed or transmitted from two materials at different temperatures.
300
Where does most of a plant's biomass come from?
carbon, hydrogen, and oxygen.
300
How do catalysts affect the rate of the reaction?
They increase the rate
300
What is the major product of the reaction given below ?
trans−2−butene
400
Energy is not written as a part of chemical equations since it is not a chemical.
Energy can be written as a reactant on the left side. of the arrow since it is being absorbed.
400
An endothermic reaction A→B has an activation energy
65
kcal/mole
and the heat of reaction is
15
kcal/mole
. The activation energy of the reaction B→A is
10
kcal/mole
400
At midday, what is happening in the leaf of a plant?
Mainly photosynthesis (due to light energy) and some cellular respiration (breaking down of sugars).
400
Which of the following is true about excess reagents?
Consumes partially
400
Which best describes the product of the following reaction?
Absolute configuration has been retained
500
The internal energy of a system decreases when heat is added to it.
Adding heat to a system does not always increase its internal energy.
500
how does radiation work? -> for example, a heater in between two cans, how does heat get radiated from the heater to the cans??
heat waves are emitted that may be absorbed, reflected, or transmitted through a colder body
500
At midnight, what is happening in the leaf of a plant?
oxygen into and carbon dioxide out of the leaf.
500
1 mole of potassium permanganate and 1 mole of ferrous sulfide are reacted in presence of excess hydrochloric acid, how many moles of Ferric sulfate will produce?
5/18
500
The products of the chemical reaction between
Na2S2O3
,
Cl2
and
H2O
are
S+HCl+Na2SO4