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A system gives out 20 J of heat and also...

A system gives out 20 J of heat and also does 40 J of work. What is the internal energy change?

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To solve the problem, we will use the First Law of Thermodynamics, which relates the change in internal energy (ΔU), heat exchanged (ΔH), and work done (W) on or by the system. The equation is given by: \[ \Delta U = \Delta H - W \] ### Step-by-Step Solution: ...
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AAKASH INSTITUTE-THERMODYNAMICS-ASSIGNMENT (Section -D) Assertion-Reason Type Questions
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  2. A : C("diamond") rightarrow C("graphite") Delta H and Delta U are sam...

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  3. A: Specific heat is an intensive property R: Heat capacity is an ext...

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  4. A: All reactions which are exothermic are spontaneous R: All reactio...

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  5. A: Enthalpy of neutralisation of 1 equivalent each of HCI and H(2)SO(...

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  6. A: q and w are path function R: q + w is a state function

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  7. A : Dissolution of sugar in water proceed via increases in entropy R...

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  8. A : For an isolated system Delta G = - TDeltaS("total") R: For an i...

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  9. A: Combustion is an exothermic process. R: Combustion is a spontaneo...

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  10. A: Total enthalpy change of a multistep process is sum of Delta H(1) ...

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  11. A : Bond energy is equal to enthalpy of formation with negative sign. ...

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  12. A: Delta H is positive for endothermic reactions. R : If total entha...

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  13. A : The energy of the universe is constant, whereas the entropy of the...

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  14. A: A non- spontaneous process becomes spontaneous when coupled with a ...

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  15. A: An ideal crystal has more entropy than a real crystal. R: An idea...

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  16. A: Work done in an irreversible isothermal process at constant volume ...

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