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Chemistry
Thermodynamics and thermochemistry
State whether the given statement is True or false:
The energy which is used up cannot be reversed to its original state.
(A) True
(B) False

Chemistry
Thermodynamics and thermochemistry
What are the standard temperature (in kelvin) and pressure (in atm) conditions for gas measurements?

Chemistry
Thermodynamics and thermochemistry
What is the difference between specific heat and enthalpy of formation?
Chemistry
Thermodynamics and thermochemistry
Why is the melting of ice is an endothermic process?
Chemistry
Thermodynamics and thermochemistry
A sample of mercury absorbed $257J$ of heat and its mass was $0.45kg$ . If it’s temperature increased by $4.09K$ , what is its specific heat in $J{\left( {kg.K} \right)^{ - 1}}$ ?

Chemistry
Thermodynamics and thermochemistry
If the vapour density for a gas is 20, then what is the volume of 20 g of this gas at NTP?

Chemistry
Thermodynamics and thermochemistry
The entropy change can be calculated by using the expression $\Delta S = \dfrac{{{q_{rev}}}}{T}$ . when water freezes in a glass beaker, choose the correct statement amongst the following.
A.$\Delta S$ (system) decreases but $\Delta S$ (surroundings) remains the same
B.$\Delta S$ (system) increases but $\Delta S$ (surroundings) decreases
C.$\Delta S$ (system) decreases but $\Delta S$ (surroundings) increases
D.$\Delta S$ (system) decreases but $\Delta S$ (surroundings) also decreases
Chemistry
Thermodynamics and thermochemistry
The specific heat of gold is $0.129J{g^{ - 1}}{C^ \circ }^{ - 1}$ . What is the molar heat capacity of gold?

Chemistry
Thermodynamics and thermochemistry
Molten iron is extremely hot, averaging about ${{1500}^{o}}C$ . The specific heat of iron is $0.46J{{\left( g{{\ }^{o}}C \right)}^{-1}}$ . How much heat is released to the atmosphere when $1kg$ molten iron cools to room temperature $\left( {{25}^{o}}C \right)$ ?

Chemistry
Thermodynamics and thermochemistry
Calculate the molar heat of vaporization of a fluid whose vapor pressure doubles when the temperature is raised from ${75^ \circ }$to ${100^ \circ }C$ .

Chemistry
Thermodynamics and thermochemistry
What does isothermal expansion mean?
Chemistry
Thermodynamics and thermochemistry
How do you begin from the Gibbs-Helmholtz equation to determine the new temperature at which a reaction ceases to become spontaneous? What fundamental assumptions are involved?
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