Chemistry

posted by .

One of my homework problems deals with finding the change in entropy of the surroundings using the equation

delta(S)= -delta(H)/T(temp.)

The numbers given were T=263K and delta(H)fusion=6.0*10^(3) J/mol

I know how to solve the problem, I just want to know why it is that even though the answer I got was negative, "it must be positive because of the surroundings." I was hoping someone would explain the concept behind this just so I understand. Thanks!

• Chemistry -

You didn't post all of the problem so this is the best guess I can come up with but I assume it is because delta H for the process in question is negative which makes -dH/T positive.

Similar Questions

1. Chem

I don't believe I'm getting the correct answers for this problem. Could someone look over my work and verify whether it is correct or not?
2. chemistry

4 moles of water are heated from 240 K to 310. find delta entropy and graph entropy against K . Info : delta H fusion of water is 5 kJ/mol delta H vaporization of water is 41.4 kJ/mol Cp of ice is 36 j/mol - k Cp of water in liters …
3. chemistry

4 moles of water are heated from 240 K to 310. find delta entropy and graph entropy against K . Info : delta H fusion of water is 5 kJ/mol delta H vaporization of water is 41.4 kJ/mol Cp of ice is 36 j/mol - k Cp of water in liters …
4. thermodynamics

A reaction has deltaHrxn=-127 kJ and delta S rxn=314 J/K. At what temperature is the change in entropy for the reaction equal to the change in entropy for the surroundings?
5. Chemistry

Clapeyron equation: dp/dT = ΔS / ΔV My textbook says, for fusion/melting reactions: dp/dT = ΔH / (T ΔV) this implies that T * ΔS = ΔH. I know T * ΔS = q and at constant pressure, that equals …
6. Physics

1. If the change in position delta(x) is related to velocity v (w/ units of m/s) in the equation delta(x)=Av, the constant A has which dimension?
7. Chemistry

A rxn has delta H ^0 rxn=-112kj and delta S^0 rxn =354 J/K. at what temp is the change in entropy for the rxn equal to the change in entropy for the surroundings?
8. Chemistry

Please explain. The enthalpy changes for two different hydrogenation reactions of C2H2 are: C2H2+H2---->C2H4 Delta H 1 C2H2+2H2---->C2H6 Delta H 2 Which expression represents the enthalpy change for the reaction below?
9. CHEMISTRY

Please explain. The enthalpy changes for two different hydrogenation reactions of C2H2 are: C2H2+H2---->C2H4 Delta H 1 C2H2+2H2---->C2H6 Delta H 2 Which expression represents the enthalpy change for the reaction below?
10. chemistry

I have two questions regarding enthalpy of reactions: 1.) Care must be taken when dissolving NaOH pellets in water because the temp. can rise dramatically. Taking NaOH as system, what can be deduced about the signs of the entropy of …

More Similar Questions