Question

QUESTION 1

Heat is required to dissolve NaOH(s) in water.

A-True

B-False

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QUESTiON 2

The below equation represents an exothermic reaction:

Reactants + delta H ----> product

ATrue

B-False

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QUESTION 3

The Styrofoam cup was used as an insulated device that allows heat loss

A-True

B-False

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QUESTION 4

The following is an endothermic reaction;

NaOH+ HCI------> NaCl+H2O+42.12KJ

A-True

B-False

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QUESTION 5

NaOH(s)---> Na^+(aq)+CH^-(aq)+44.02kJ

Calculate the amount (in moles) of NaOH needed to make the reaction above releases 1000 kJ

22.71 mol

0.04402 mol

44020 mol

44.02 mol

______________

QUESTION 6

Use the equation below to find heat released if 2 moles of NaOH was dissolved in water.

NaOH(s)---> Na^+(aq)+CH^-(aq)+44.02kJ

A-44.02 kJ

B-2.00 KJ

C-88.02 KJ

D-22.01 KJ

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7- In a neutralization reaction, NaOH(ag) reacted with HCl(ag) at 21.019C to produce 80g of NaCI solution at 24°C. Calculate (g) the heat of solution in Joules. (s =4.184 J/C.g)

A-7032.46 J

B-1000.8 J

C-168779.2 J

D-8033.28 J

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QUESTION 8

607 kJ of heat is released when 1 mole of HCl reacts with 1 mole of NaOH to produce 1 mole of NaCl and 1 mole of H2O.The thermochemical equation for this reaction is:

?

PLEASE whrite the equation

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QUESTION 9

What is the value of delta H of the following chemical reaction?

NaOH(aq)+HCl(aq)-----> NaCl(ag)+ H2O(aq)+215KJ SO delta H is equal:

A- -215 KJ/mol

B- +215 kJ/mol

C- -215 KJ

D- +215 KJ

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QUESTiON 10

In exothermic reaction, temperature decreases and heat energy increases

A-True

B-False

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QUESTION 11

A higher temperature should be recorded for the solution produced from dissolving NaOH(s) in distilled water:

A-True

B-False

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QUESTION 12

Heat of solution of NaOH should have a negative

A-True

B-False

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QUESTION 13

A thermometer was used in the lab to measure the temperature of the solutions

A-True

B-False

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QUESTION 14

A chemical reaction that releases heat enerey is called exothermic reaction

A-True

B-False

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QUESTION 15

Neutralization reaction is an exothermic reaction:

A-TRUE

B-False

Answer 1

Exothermic reaction - are the reactions in which heat is released from the reaction to surroundings .

i.e. reactants >>>>> products + heat

While endothermic reactions are those in which heat is given to the the reactants to form the products .

i.e. reactants + heat >>>>>> products .

1. Dissolution of NaOH in water is an exothermic reaction , so heat is released from the reaction and thus given statement is FALSE .

2. For an exothermic reaction , heat is released and shown in product side as

Reactants >>>>>>> product + ∆H

Thus given representation in the question is FALSE .

3. Insulated device neither allows heat to release from device nor to enter into the device .

So given statement is FALSE .

4. NaOH + HCl >>>> NaCl + H2O + 42.12 KJ

Is an exothermic Reaction and a neutralisation Reaction .

Neutralisation reactions are always exothermic as represented by heat on product side.

So again given statement is FALSE .

kindly post other questions separately.