The specific heat of lead is 0.030 cal/gC° 300g of lead shot at 100°C is mixed with 100 g of water at 70°C in an insulated container. The final temperature of the mixture is?

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The specific heat of lead is 0.030 cal/gC° 300g of lead shot at 100°C is mixed with 100 g of water at 70°C in an insulated container. The final temperature of the mixture is? Answer: 72.5°C

The final temperature of a mixture in an insulated system is determined by the principle of conservation of energy, where the heat lost by the hotter substance equals the heat gained by the cooler substance. Lead, having a low specific heat, transfers heat quickly, while water, with high specific heat, warms up slowly, resulting in a final temperature close to the water’s initial temperature.

Question context

This question is part of 🔬 General Science within the broader 🌐 Current Affairs & GK subject and appears in the SPSC – Sindh Public Service Commission preparation collection. Reviewing the answer together with nearby questions helps reinforce the underlying concept and identify how it may appear in competitive exams.