When 250 G of Ba(s)is Added to 100

question 38

Multiple Choice

When 2.50 g of Ba(s) is added to 100.00 g of water in a container open to the atmosphere, the reaction shown below occurs and the temperature of the resulting solution rises from 22.00 °C to 40.32 °C. If the specific heat of the solution is 4.18 J g^-1°C^-1, calculate ΔH for the reaction, as written. Ba(s) + 2H₂O(l) → Ba(OH) ₂(aq) + H₂(g) Δ_rH = ?

• A)-431 kJ mol^-1
• B)-3.14 kJ mol^-1
• C)+3.14 kJ mol^-1
• D)+431 kJ mol^-1

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Definitions:

Inflation Rate

A percentage-based uplift in the cost of goods and services within an economy over a designated timeframe.

Zero-inflation

A situation where the price level of goods and services remains constant over time, indicating an absence of inflation in the economy.

Phillips Curve

An economic concept that describes an inverse relationship between rates of unemployment and corresponding rates of inflation, suggesting that higher inflation is associated with lower unemployment and vice versa.

1970s

A decade marked by significant events including economic turmoil, the oil crisis, social movements, and the Cold War's continuing tension.