chemistry

you wish to combine two samples, one sample contains is solid water at 0 degree celsius.The other sample contains liquid water at 100 degree celsius,you want to combine both raise the temperature to 100 but boil off only 50 ml to gas phase keep the rest as liquid.How much energy is neededfor this?

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asked by treasa
  1. I would like to know how much ice and how much liquid water @ 100 C you have? I haven't thought through the problem and that info may or may no be needed; however, it would make me feel better to have that info.

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  2. ELASTICITY, LIKE YOUR SOCKS (10/10 points)
    The crystal structure of graphite is shown below. Use the figure to answer the following questions.

    Compare the Young's moduli for the directions indicated in the figure. Fill in the blank.

    The modulus along a is _________ that along b

    equal to - correct
    The modulus along a is _________ that along c

    greater than - correct
    The modulus along b is _________ that along c

    greater than - correct
    Which of the following reasons best explain your reasoning when comparing the moduli of b and c?

    The Poisson ratio is greater than 0.3 in graphite.
    The two directions are crystallographically identical
    Fundamental bending and stretching of bonds is different in the two directions
    Van der Waals bonding has a lower bond strength than colavent bonding - correct <--
    Stretching of covalent bonds requires greater force than bending such bonds
    The opportunity to stetch rings in one direction gives one direction a lower modulus

    Which of the following reasons best explain your reasoning when comparing the moduli of a and b?

    Stretching of covalent bonds requires greater force than bending such bonds
    The Poisson ratio is greater than 0.3 in graphite.
    The two directions are crystallographically identical - correct <---
    Fundamental bending and stretching of bonds is different in the two directions
    The opportunity to stetch rings in one direction gives one direction a lower modulus
    Van der Waals bonding has a lower bond strength than colavent bonding

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    posted by 3091

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