Home
Class 11
CHEMISTRY
A certain electric motor produced 16kJ o...

A certain electric motor produced `16kJ` of energy each second as mechanical work and lost `3kJ` as heat to the surroundings. What is the change in the internal energy of the motor and its power supply each second?

Text Solution

Verified by Experts

Energy is lost form the system as work, thus `W` is negative.
`:. W =- 16kJ`
Enegry is lost as heat, so `q =- 3kJ`
Therefore, by the first law of thermodnamics,
`DeltaU = q +w =- 3 - 16 - 19kJ`
Promotional Banner

Topper's Solved these Questions

  • THERMODYNAMICS

    CENGAGE CHEMISTRY|Exercise Ex 6.1|26 Videos

  • THERMODYNAMICS

    CENGAGE CHEMISTRY|Exercise Ex 6.2|27 Videos

  • STOICHIOMETRY

    CENGAGE CHEMISTRY|Exercise Archives Subjective|33 Videos

Similar Questions

Explore conceptually related problems

A certain electric motor produced 15 kJ of energy each second as numerical work and lost 2kJ as heat to the surroundings. What is the change in the internal energy of the motor and its power supply each second.

A system absorbs 50 kJ heat and does 20 kJ of work. What is the net change in the internal energy of the system ?

A certain reaction is exothermic by 220kJ and does 10kJ of work. What is the change is the internal energy of the system at constant temperture?

A system releases 15Kj of energy as heat and does 10 Kj of work on surroudings, What is change in internal energy ?

A system absorbs 600J of heat and work equivalent to 300J on its surroundings. The change in internal energy is:

A system absorb 600 J of heat and work equivalent to 300 J on its surroundings. The change in internal energy

A gas performs 0.320 kJ work on surroundings and absorbs 120 J of heat from the surroundings.Hence change in internal energy is

A system absorbs 6 kJ of heat and does 1.5 kJ of work on its surroundings. The charge in internal energy is ………

CENGAGE CHEMISTRY-THERMODYNAMICS-Archives (Subjective)
  1. A certain electric motor produced 16kJ of energy each second as mechan...

    Text Solution

    |

  2. The enthalpies for the following reactions (DeltaH^(Theta)) at 25^(@)C...

    Text Solution

    |

  3. The standared enthalpies of formation at 298K for C C1(g), H(2)O(g), C...

    Text Solution

    |

  4. Given that: i. C(s) + O(2)(g) rarr CO(2)(g) , DeltaH =- 94.05 kcal ...

    Text Solution

    |

  5. The following statements is true only under some specific conditions. ...

    Text Solution

    |

  6. The bond dissociation energies of gaseous H(2),C1(2), and HC1 are 100,...

    Text Solution

    |

  7. The standard molar heats of formation of ethane, carbon dioxide, and l...

    Text Solution

    |

  8. An intimate mixture of ferric oxide and aluminium is used as solid fue...

    Text Solution

    |

  9. The standard ethelpy of combustion at 25^(@)C of hydrogen, cyclohexene...

    Text Solution

    |

  10. Using the data ( all vaues in kcal mol^(-1) at 25^(@)C) given below, c...

    Text Solution

    |

  11. Determine enthalpy change for, C(3)H(8(g))+H(2(g))rarr C(2)H(6(g))+C...

    Text Solution

    |

  12. Compute the heat of formation of liquie methyl alcohol is kilojoule pe...

    Text Solution

    |

  13. From the following data, calculate the enthalpy change for the combust...

    Text Solution

    |

  14. The standard heat of formation values of SF(6)(g), S(g), and F(g) are ...

    Text Solution

    |

  15. Show that the reaction CO(g) +(1//2)O(2)(g) rarr CO(2)(g) at 300K ...

    Text Solution

    |

  16. A sample of argon gas at 1atm pressure and 27^(@)C expands reversibly ...

    Text Solution

    |

  17. Diborane is a potential rocket fuel that undergoes combustion accordin...

    Text Solution

    |

  18. The standard potential of the following cell is 0.23V at 15^(@)C and 0...

    Text Solution

    |

  19. When 1pentyne (A) is treated with 4N alcoholic KOH at 175^(@)C, it is ...

    Text Solution

    |

  20. Two moles of a perfect gas undergo the following processes: a. A rev...

    Text Solution

    |

  21. C(v) values of He is always (3R)/(2) but C(v) values of H(2) is (3R)/(...

    Text Solution

    |