Answer: -
B: it can be flattened and bent
Explanation: -
Metals are malleable and can be flattened. Metals are ductile and can be deformed and bent.
Metals are bonded together by metallic bonds.
Hence a substance that is composed of atoms that are held together by metallic bonds can be flattened and bent.
The answer is A my good sir
The equilibrium point for a reaction is the point at which the rate of the forward reaction equals that of the reverse reaction. At this point there will not be a net change in the amount of products or reactants observed.
I hope this helps. Let me know if anything is unclear.
Q = mct
Q being heat in Jules
M being mass in grams
C being specific heat in J/g*C
T being the change in temperature
64.4J = 25g*c*5.1C
64.4J = (127.5g*C)*c
c = 0.505 J/g*C
Answer:
Work is given by -PdV.
It clearly means that when volume of the system changes, work is done either on the system or by the system depending upon volume change.
So, pressure change term -VdP is not included because it is indicating a constant volume.
But in case of enthalpy,
H = U + PV
So, for enthalpy change we can write
dH = dU + PdV + VdP
Because enthalpy change is the sum of all energy changes in the system that includes internal energy, P-V work and effect of pressure change.