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While dealing with thermochemical reacti...

While dealing with thermochemical reactions, the temperature and pressure of a reactant must be…………as those of products.

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Explore conceptually related problems

After a chemical reaction the total mass of reactant and products

In an exothermic reaction, the total enthalpy of reactant is ………….then that of products.

In a gaseous reaction, an increase in the pressure of the reactant gases increases the rate of reaction.

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Knowledge Check

  • After a chemical reaction the total mass of reactant and products

    A
    always increases
    B
    always decreases
    C
    does not change
    D
    either increases or decreases

  • In which of the followng chemical equations, the abbreviations represent the correct states of the reactants and products involved at reaction temperature ?

    A
    `2H_(2)(l)+O_(2)(l)to2H_(2)O(g)`
    B
    `2H_(2)(g)+O_(2)(l)to2H_(2)O(l)`
    C
    `2H_(2)(g)+O_(2)(g)to2H_(2)O(l)`
    D
    `2H_(2)(g)+O_(2)(g)to2H_(2)O(g)`

  • While dealing with poverty-stricken students, schools must

    A
    provide them with appropriate training to develop skills so as to develop self-esteem
    B
    have zero tolerance for excuses for not attending school regularly
    C
    attach greater Importance to curricular activity by segregating them for better attention
    D
    expect them to possess a high standard of behaviour
    • CENGAGE CHEMISTRY-THERMODYNAMICS-Exercises (Fill In The Blanks)
    1. While dealing with thermochemical reactions, the temperature and press...

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    2. In an exothermic reaction, the total enthalpy of reactant is ………….then...

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    3. The heat content of the products is more than that of the reactants in...

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    4. The standard molar enthalpy of a substance is the enthalpy of the subs...

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    5. The conventional standard molar enthalpy of an element in its stable s...

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    6. The heat released when the requisite amounts of iron in the gaseous st...

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    7. The products of combustion of hydrocarbon at 298 K are ……….. and ……………...

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    8. The products of combustion of a hydrocarbon at 398K are ……………..and…………...

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    9. The enthalpy of neutralisation is about………. .

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    10. The enthalpy of neutralisation of a weak acid is …………….. than that of ...

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    11. The enthalpy of fusion of KCI is…………..than that of naphthalene.

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    12. The enthalpy change of the reaction: CuSO(4)(s) +5H(2)O(l)rarr CuSO(...

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    13. The enthalpy change when 1mol of graphite is converted into diamond is...

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    14. The stable state of aggregation of carbon at 298K and 1atm pressure is...

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    15. The stable stae of aggregation of sulpur at 298K and 1atm pressure is…...

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    16. The part of the universe chosen for study of enegry changes is called ...

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    17. The energy stored within a substance is called its…………..

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    18. A reaction in which heat is absorbed is called an……………….

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    19. The enthalpy of any element in the standard state is taken as…………….

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    20. Heat of neutralisation of an acid is the amount of heat evolved when …...

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