12 g of an element reacts with 32 g of oxygen. What is the equivalent weight of the element?
Show Hint
- 12
- 6
- 4
- 3
The Correct Option is D
Solution and Explanation
Top Questions on Thermodynamics
The standard heat of formation, in kcal/mol, of $Ba^{2+}$ is:
Given: Standard heat of formation of SO₄²⁻(aq) = -216 kcal/mol, standard heat of crystallization of BaSO₄(s) = -4.5 kcal/mol, standard heat of formation of BaSO₄(s) = -349 kcal/mol.- NEET (UG) - 2025
- Chemistry
- Thermodynamics
- A piston-cylinder assembly having 250 mm diameter contains 0.01 kg of water vapor at 1 MPa and 200°C. The specific volume of the vapor is 0.020602 m\(^3\)/kg. The system expands as per the relation \( p v^n = {constant} \), where \( p \) is pressure and \( v \) is the specific volume. The expansion of water vapor displaces the piston by 50 mm. If the final pressure is 0.35 MPa, the value of the exponent \( n \) is ........ (rounded off to two decimal places).
- GATE XE - 2025
- Engineering Sciences
- Thermodynamics
A stream of superheated steam (2 MPa, 300°C) mixes with another stream of superheated steam (2 MPa, 400°C) through a steady-state adiabatic process. The flow rates of the streams are 3 kg/min and 2 kg/min, respectively. This mixture then expands in an adiabatic nozzle to a saturated mixture with quality of 0.77 and 1 kPa. Neglect the velocity at the nozzle entrance and the change in potential energies. The velocity at the nozzle exit (in m/s) is ......... (rounded off to two decimal places).
Use the following data:
At 2 MPa, 300 °C: Specific enthalpy of superheated steam = 3024.2 kJ/kg
At 2 MPa, 400 °C: Specific enthalpy of superheated steam = 3248.4 kJ/kg
At 1 kPa: Specific enthalpy of saturated water = 29.3 kJ/kg
At 1 kPa: Specific enthalpy of saturated vapour = 2513.7 kJ/kg
- GATE XE - 2025
- Engineering Sciences
- Thermodynamics
- Consider a gas obeying the relation \( P(v - b) = RT \), where \( b \) and \( R \) are constants. Which of the following statement(s) is/are CORRECT about the specific heat capacity at constant pressure?
- GATE XE - 2025
- Engineering Sciences
- Thermodynamics
- A rigid tank of 300 litre capacity contains 3 kg of oxygen (molar mass = 32 kg/kmol) at 25°C. If oxygen behaves as an ideal gas, the pressure (in kPa) inside the tank is ......... (rounded off to two decimal places).
Use: Universal gas constant \( R_u = 8.314 \, {kJ/kmol-K} \)
- GATE XE - 2025
- Engineering Sciences
- Thermodynamics
Questions Asked in TS EAMCET exam
- If the sum of two vectors is a unit vector, then the magnitude of their difference is:
- The molecular weight of a gas is 32. If 0.5 moles of the gas occupy 22.4 liters at standard temperature and pressure (STP), what is the density of the gas?
- TS EAMCET - 2025
- Gas laws
- Which of the following forces have infinite range?
- TS EAMCET - 2025
- laws of motion
- A rod has length \( L \). The linear mass density is \( 2x \, \text{kg/m} \), where \( x \) is the distance from the left end. The center of mass of the rod from the left end lies at a distance of
- TS EAMCET - 2025
- Particle Motion
- A ball is projected vertically up with speed \( V_0 \) from a certain height \( H \). When the ball reaches the ground, the speed is \( 3V_0 \). The time taken by the ball to reach the ground and height \( H \) respectively are:
- TS EAMCET - 2025
- projectile motion