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  1. If "3.4 atm" is a gauge pressure (which is commonly used with pressure cookers) the temperature will be about 147.6°C. If "3.4 atm" is an absolute pressure the temperature will be about 138.2°C.

    2 Answers · Science & Mathematics · 29/06/2017

  2. q = mC∆T 1.125x10^4J = 500 g x C x 50 deg C = 1.125x10^4J/500 g/50 deg C = 0.45 J/g/deg It could be iron if the value for iron was 0.45 J/g/deg instead of the indicated 450, although the indicated values...

    3 Answers · Science & Mathematics · 16/06/2017

  3. b. Before water can change state hydrogen bonds between water molecules must be broken.

    2 Answers · Science & Mathematics · 13/06/2017

  4. 1. d The number of each atom need to be the same before and after the arrow. 2. b The energy all goes into breaking bonds when water boils and melts comment for explanation

    2 Answers · Science & Mathematics · 13/06/2017

  5. Supposing the H2 was also measured at STP: (30.0 L H2) x (1 mol O2 / 2 mol H2) = 15.0 L O2

    1 Answers · Science & Mathematics · 23/05/2017

  6. ...) x (13.0 g) x (109.0 - 100) ∘C = 235.17 J to heat the steam to 109.0 ∘C 380.38 J + 4336.8 J + 5439.2 J + 29341...

    1 Answers · Science & Mathematics · 21/05/2017

  7. ...mol) x (5.8284 mol) = 237.041 kJ = 237041 J from condensing the steam (75.4 J/(mol • °C)) x (5.8284 mol) x (100 - 0)°C = 43946 ...

    2 Answers · Science & Mathematics · 14/05/2017

  8. 1 mol H2O = 18.01532 g (2.09 J/gK) x (18.01532 g) x (0 - (-50.0)) K = 1882.6 J to warm the ice to its melting point (6.01 kJ/mol) x (1 mol) = 6.01 kJ = 6010 J to melt the ice (4.18 J/gK) x (18.01532 g) x (70 - 0) K = 5271.3 J to...

    1 Answers · Science & Mathematics · 14/05/2017

  9. Follow the steps in this video https://www.youtube.com/watch?v=jy0CoTpi88Q You don't have the calculation for heating the ice up to melting since the ice is already at 0C. Just replace the numbers in the example with...

    1 Answers · Science & Mathematics · 13/05/2017

  10. ...x (1.73 mol) x (154.5 - 100.0)°C = 3397.1 J from cooling the steam to its boiling point (40660 J/mol) x (1.73 mol) = 70341.8 ...

    1 Answers · Science & Mathematics · 11/05/2017

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