How much energy is needed to heat 1 kg of sand, which has a specific heat of 664 J / (kg K), from 30°C to 50°C?

Would heating water increase or decrease its ability to dissolve a solute?

A chemical reaction begins with 356kJ of energy and ends with 456kJ of energy. What is the enthalpy of the reaction? Was the reaction endothermic or exothermic?

Design a process for separating a mixture of salt, iron filings, and sand

Explain its significance. Check all that apply. Systems with high potential energy tend to change in the direction of lower potential energy, obtaining energy from another objects.

What is the color of bromocresol green indicator in a solution with a ph of 2.0

How should scientist respond when new evidence that challenges current is presented?

Consider the following reaction, equilibrium concentrations, and equilibrium constant at a particular temperature. Determine the equilibrium pressure of H2. D2 (g) + H2 (g) ⇌ 2 HD (g) Kp = 1.80 P (D2) eq = 1.1 * 10-3 atm P (HD) eq = 2.7 * 10-3 atm

Find δe for the change in state of 1.0 molh2o (l) at 79 ∘c to h2o (g) at 116 ∘c. the heat capacity of h2o (l) = 75.3 j/molk, heat capacity of h2o (g) = 25.0 j/molk, and the heat of vaporization of h2o is 40.7*103j/mol at 100 ∘c.

Balloon A started with a volume of 1.76 L. The temperature of the room the balloon was in was 295 K. The balloon was heated to a temperature of 253.15 K. What is the new volume?

The standard internal energy change for a reaction can be symbolized as ΔU°rxn or ΔE°rxn. For the following reaction equations, calculate the energy change of the reaction at 25 °C and 1.00 bar. Sn (s) + Cl2 (g) - - - > SnCl4 (l) + H (KJmol) - 511.3.